| X | ||||||||||
- Definition Boolean flag that is true when the XBRL content amends previously-filed or accepted submission. No definition available.
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| X | ||||||||||
- Definition Area code of city No definition available.
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| X | ||||||||||
- Definition Cover page. No definition available.
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| X | ||||||||||
- Definition End date of current fiscal year in the format --MM-DD. No definition available.
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| X | ||||||||||
- Definition Fiscal period values are FY, Q1, Q2, and Q3. 1st, 2nd and 3rd quarter 10-Q or 10-QT statements have value Q1, Q2, and Q3 respectively, with 10-K, 10-KT or other fiscal year statements having FY. No definition available.
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| X | ||||||||||
- Definition This is focus fiscal year of the document report in CCYY format. For a 2006 annual report, which may also provide financial information from prior periods, fiscal 2006 should be given as the fiscal year focus. Example: 2006. No definition available.
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| X | ||||||||||
- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. No definition available.
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| X | ||||||||||
- Definition Boolean flag that is true only for a form used as an quarterly report. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Boolean flag that is true only for a form used as a transition report. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'. No definition available.
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| X | ||||||||||
- Definition Address Line 1 such as Attn, Building Name, Street Name No definition available.
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| X | ||||||||||
- Definition Name of the City or Town No definition available.
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| X | ||||||||||
- Definition Code for the postal or zip code No definition available.
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| X | ||||||||||
- Definition Name of the state or province. No definition available.
|
| X | ||||||||||
- Definition A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Indicate number of shares or other units outstanding of each of registrant's classes of capital or common stock or other ownership interests, if and as stated on cover of related periodic report. Where multiple classes or units exist define each class/interest by adding class of stock items such as Common Class A [Member], Common Class B [Member] or Partnership Interest [Member] onto the Instrument [Domain] of the Entity Listings, Instrument. No definition available.
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| X | ||||||||||
- Definition Indicate 'Yes' or 'No' whether registrants (1) have filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that registrants were required to file such reports), and (2) have been subject to such filing requirements for the past 90 days. This information should be based on the registrant's current or most recent filing containing the related disclosure. No definition available.
|
| X | ||||||||||
- Definition Indicate if registrant meets the emerging growth company criteria. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Indicate if an emerging growth company has elected not to use the extended transition period for complying with any new or revised financial accounting standards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen. No definition available.
|
| X | ||||||||||
- Definition Indicate whether the registrant is one of the following: Large Accelerated Filer, Accelerated Filer, Non-accelerated Filer. Definitions of these categories are stated in Rule 12b-2 of the Exchange Act. This information should be based on the registrant's current or most recent filing containing the related disclosure. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Two-character EDGAR code representing the state or country of incorporation. No definition available.
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| X | ||||||||||
- Definition Boolean flag that is true when the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Boolean flag that is true when the registrant is a shell company as defined in Rule 12b-2 of the Exchange Act. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Indicates that the company is a Smaller Reporting Company (SRC). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Local phone number for entity. No definition available.
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| X | ||||||||||
- Definition Title of a 12(b) registered security. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Name of the Exchange on which a security is registered. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Trading symbol of an instrument as listed on an exchange. No definition available.
|
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Value received from shareholders in common stock-related transactions that are in excess of par value or stated value and amounts received from other stock-related transactions. Includes only common stock transactions (excludes preferred stock transactions). May be called contributed capital, capital in excess of par, capital surplus, or paid-in capital. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are expected to be realized in cash, sold, or consumed within one year (or the normal operating cycle, if longer). Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Represents the caption on the face of the balance sheet to indicate that the entity has entered into (1) purchase or supply arrangements that will require expending a portion of its resources to meet the terms thereof, and (2) is exposed to potential losses or, less frequently, gains, arising from (a) possible claims against a company's resources due to future performance under contract terms, and (b) possible losses or likely gains from uncertainties that will ultimately be resolved when one or more future events that are deemed likely to occur do occur or fail to occur. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition For a classified balance sheet, the cumulative difference between the rental income or payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense, by the lessor or lessee, respectively, more than one year after the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Total obligations incurred as part of normal operations that are expected to be paid during the following twelve months or within one business cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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| X | ||||||||||
- Definition Amount of noncurrent assets classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of liabilities classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Aggregate par or stated value of issued nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable preferred shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amounts receivable from officers and directors resulting from the sale of stock to officers or directors before the cash payment is received. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. No definition available.
|
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS (Unaudited) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Operating expenses: | ||||
| Research and development | $ 8,582 | $ 9,181 | $ 24,720 | $ 23,387 |
| General and administrative | 1,733 | 1,364 | 6,094 | 3,889 |
| Total operating expenses | 10,315 | 10,545 | 30,814 | 27,276 |
| Loss from operations | 10,315 | 10,545 | 30,814 | 27,276 |
| Other income: | ||||
| Other income, net | 344 | 261 | 1,033 | 559 |
| Net loss | (9,971) | (10,284) | (29,781) | (26,717) |
| Other comprehensive income/(loss) | 15 | (4) | 17 | (4) |
| Total comprehensive loss | $ (9,956) | $ (10,288) | $ (29,764) | $ (26,721) |
| Net loss per share, basic and diluted | $ (12.41) | $ (15.90) | $ (40.15) | $ (45.11) |
| Weighted average number of shares used in computing net loss per share, basic and diluted | 803,229 | 646,800 | 741,711 | 592,237 |
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The amount of net income (loss) from continuing operations per each basic and diluted share of common stock or unit when the per share amount is the same for both basic and diluted shares. No definition available.
|
| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Generally recurring costs associated with normal operations except for the portion of these expenses which can be clearly related to production and included in cost of sales or services. Includes selling, general and administrative expense. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. No definition available.
|
| X | ||||||||||
- Definition Amount after tax of other comprehensive income (loss) attributable to parent entity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS). No definition available.
|
| X | ||||||||||
- Definition Forgiveness of promissory notes from related parties for purchase of common stock. No definition available.
|
| X | ||||||||||
- Definition Interest on promissory notes from related parties for purchase of common stock. No definition available.
|
| X | ||||||||||
- Definition Paydown of promissory notes from related parties for purchase of common stock. No definition available.
|
| X | ||||||||||
- Definition Temporary equity issuance cost stock issued during period new issues. No definition available.
|
| X | ||||||||||
- Definition Temporary equity stock issued during period shares new issues. No definition available.
|
| X | ||||||||||
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Value, after forfeiture, of shares issued under share-based payment arrangement. Excludes employee stock ownership plan (ESOP). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Value of stock issued as a result of the exercise of stock options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. No definition available.
|
| X | ||||||||||
- Definition The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Value of new stock classified as temporary equity issued during the period. No definition available.
|
| X | ||||||||||
- Definition Deferred offering costs included in accounts payable and accrued expenses. No definition available.
|
| X | ||||||||||
- Definition Forgiveness of promissory notes from related parties for purchase of common stock. No definition available.
|
| X | ||||||||||
- Definition Increase (decrease) in prepaid expenses and other long-term assets. No definition available.
|
| X | ||||||||||
- Definition Noncash interest income (loss), net. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Future cash outflow to pay for purchases of fixed assets that have occurred. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including, but not limited to, disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of increase (decrease) in cash, cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; including effect from exchange rate change. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the amounts payable to vendors for goods and services received and the amount of obligations and expenses incurred but not paid. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from financing activities, including discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from investing activities, including discontinued operations. Investing activity cash flows include making and collecting loans and acquiring and disposing of debt or equity instruments and property, plant, and equipment and other productive assets. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of cash inflow (outflow) from operating activities, including discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The cash inflow from the additional capital contribution to the entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of noncash expense for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
Organization and Liquidity Risks |
9 Months Ended |
|---|---|
Sep. 30, 2019 | |
| Organization Consolidation And Presentation Of Financial Statements [Abstract] | |
| Organization and Liquidity Risks |
1. Organization and Liquidity Risks
Description of the Business RAPT Therapeutics, Inc. (“RAPT” or the “Company”) is a clinical-stage, immunology-based biopharmaceutical company focused on discovering, developing and commercializing oral small molecule therapies for patients with significant unmet needs in oncology and inflammatory diseases. Utilizing its proprietary drug discovery and development engine, the Company develops highly selective small molecules that are designed to modulate the critical immune responses underlying these diseases. The Company changed its name from FLX Bio, Inc. to RAPT Therapeutics, Inc. on May 21, 2019. The Company is located in South San Francisco, California.
Initial Public Offering
On November 4, 2019, the Company completed its initial public offering (“IPO”). The Company’s Registration Statement on Form S-1 (File Nos. 333-232572) relating to the IPO was declared effective by the Securities and Exchange Commission (“SEC”) on October 30, 2019. The shares began trading on the Nasdaq Global Market on October 31, 2019. The Company issued 3,000,000 shares of its common stock at an offering price at $12.00 per share. Immediately prior to the closing of the Company’s IPO on November 4, 2019, all outstanding shares of the Company’s convertible preferred stock converted into 17,467,184 shares of the Company’s common stock. Shortly following the close of the offering, the underwriters exercised their option to purchase an additional 427,360 shares at the IPO price per share. In aggregate, the shares issued in the offering generated approximately $33.8 million in net proceeds after deducting underwriting discounts and other offering related costs.
In connection with the completion of its IPO, on November 4, 2019, the Company’s certificate of incorporation was amended and restated to provide for 500,000,000 authorized shares of common stock with a par value of $0.0001 per share and 50,000,000 authorized shares of preferred stock with a par value of $0.0001 per share.
Liquidity and Management Plans
The accompanying condensed consolidated financial statements have been prepared assuming that the Company will continue as a going concern. However, since inception, the Company has incurred net losses and negative cash flows from operations and such losses are expected to continue for the foreseeable future. As of September 30, 2019, the Company had an accumulated deficit of $148.7 million, cash and cash equivalents of $48.3 million and working capital of $45.8 million.
Management plans to continue to incur substantial costs in order to conduct research and development activities and additional capital will be needed to undertake these activities. The Company intends to raise such capital through the issuance of additional equity, borrowings, and strategic alliances with other companies. However, if such arrangements are not available at adequate levels or on acceptable terms, the Company would be required to significantly reduce operating expenses and delay or reduce the scope of or eliminate some of its development programs. Management believes that the Company’s current cash and cash equivalents, including the net proceeds of approximately $33.8 million from the closing of its IPO in November 2019 as described above, will provide sufficient funds to enable the Company to meet its obligations for at least twelve months from the filing date of this report.
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- Definition The entire disclosure for the nature of an entity's business, major products or services, principal markets including location, and the relative importance of its operations in each business and the basis for the determination, including but not limited to, assets, revenues, or earnings. For an entity that has not commenced principal operations, disclosures about the risks and uncertainties related to the activities in which the entity is currently engaged and an understanding of what those activities are being directed toward. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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Summary of Significant Accounting Policies |
9 Months Ended |
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Sep. 30, 2019 | |
| Accounting Policies [Abstract] | |
| Summary of Significant Accounting Policies |
2. Summary of Significant Accounting Policies Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and pursuant to Article 10 of Regulation S-X of the Securities Act of 1933, as amended (Securities Act). Accordingly, they do not include all of the information and notes required by U.S. GAAP for complete financial statements. These unaudited condensed consolidated financial statements include only normal and recurring adjustments that the Company believes are necessary to fairly state the Company’s financial position and the results of its operations and cash flows. Interim-period results are not necessarily indicative of results of operations or cash flows for a full year or any subsequent interim period. The condensed balance sheet at December 31, 2018 has been derived from the audited financial statements at that date but does not include all disclosures required by U.S. GAAP for complete financial statements. Because all of the disclosures required by U.S. GAAP for complete financial statements are not included herein, these unaudited condensed consolidated financial statements and the notes accompanying them should be read in conjunction with the Company’s audited consolidated financial statements included in the Registration Statement on Form S-1 and related Prospectus dated October 30, 2019 filed with the SEC pursuant to Rule 424(b)(4) of the Securities Act of 1933, as amended (“Prospectus”).
Reverse Stock Split On July 19, 2019, the Company filed an amendment to the Company’s amended and restated certificate of incorporation to effect a reverse split of shares of the Company’s common stock on a one-for-six basis (the “Reverse Stock Split”). In connection with the Reverse Stock Split, the conversion ratio for the Company’s outstanding convertible preferred stock was proportionately adjusted such that the common stock issuable upon conversion of such preferred stock was decreased in proportion to the Reverse Stock Split. The par value of the common stock was not adjusted as a result of the Reverse Stock Split. All references to common stock, options to purchase common stock, early exercised options, share data, per share data, convertible preferred stock (to the extent presented on an as-converted to common stock basis) and related information contained in these consolidated financial statements have been retrospectively adjusted to reflect the effect of the Reverse Stock Split for all periods presented. Deferred Offering Costs Deferred offering costs consisting of direct legal, accounting, printing and other fees and costs related to the IPO are capitalized. The deferred offering costs were reclassified to additional paid-in capital upon the effectiveness of the IPO in November 2019. As of September 30, 2019, $2.8 million of deferred offering costs were capitalized and included in other assets. Net Loss Per Share Basic net loss per share is computed by dividing the net loss by the weighted average number of common shares outstanding during the period, without consideration of potential dilutive securities. Diluted net loss per common share is computed by dividing the net loss by the sum of the weighted average number of common shares outstanding during the period plus the potential dilutive effects of potential dilutive securities outstanding during the period calculated in accordance with the treasury stock method. Diluted net loss per share is the same as basic net loss per share since the effect of potentially dilutive securities is anti-dilutive. Recent Accounting Pronouncements
From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board (“FASB”) or other standard setting bodies and adopted by us as of the specified effective date. Unless otherwise discussed, the impact of recently issued standards that are not yet effective will not have a material impact on our condensed consolidated financial statements upon adoption. Under the Jumpstart Our Business Startups Act of 2012, as amended (the “JOBS Act”), we meet the definition of an emerging growth company, and have elected the extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act.
Recently Issued Accounting Pronouncement Not Yet Adopted
In February 2016, the FASB issued ASU No. 2016-02, Leases. ASU 2016-02 requires lessees to put most leases on their balance sheet while recognizing expense in a manner similar to existing accounting. ASU 2016-02 states that a lessee would recognize a lease liability for the obligation to make lease payments and a right-to-use asset for the right to use the underlying asset for the lease term. The new accounting guidance is effective for the Company for fiscal periods beginning after December 15, 2019 and early adoption is permitted. The Company is currently assessing the timing of adoption and the impact that the adoption will have on its consolidated financial statements and related disclosures.
In June 2016, the FASB issued ASU No. 2016-13 Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 amended guidance on reporting credit losses for assets held at amortized cost basis and available-for-sale debt securities. For available-for-sale debt securities, credit losses will be presented as an allowance rather than as a write-down. This standard is effective for the Company’s fiscal year beginning after December 31, 2020. Early adoption is permitted for all entities. The Company is currently assessing the timing of adoption and the impact that the adoption of ASU 2016-13 will have on its condensed consolidated financial statements and related disclosures.
In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230), which provides greater clarity to preparers on the treatment of certain items within an entity’s statement of cash flows. ASU 2016-15 is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The guidance is effective for the Company on January 1, 2019, and the Company is currently evaluating the impact that the adoption of ASU 2016-15 will have on its consolidated financial statements and related disclosures.
In June 2018, the FASB issued ASU No. 2018-07, Compensation—Stock Compensation (Topic 718): Improvements to Non-Employee Share-Based Payment Accounting as part of the FASB simplification initiative. ASU 2018-07 expands the scope of Topic 718, allowing the Company to apply the requirements of Topic 718 to certain non-employee awards to acquire goods and services from non-employees. This ASU will be effective for the Company for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020, with early adoption permitted. The Company is currently assessing the timing of adoption and the impact that the adoption of ASU 2018-07 will have on its consolidated financial statements and related disclosures.
In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurements (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement as part of the FASB’s disclosure framework project. ASU 2018-13 modifies the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement by removing the requirement to disclose amounts of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for timing of transfers between levels, and the valuation process for Level 3 fair value measurements. This ASU also modifies existing disclosure requirements by clarifying that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date, and it adds required disclosures for the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period, and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. This ASU will be effective for the Company for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019. The Company is currently assessing the impact of this ASU on its consolidated financial statements.
In November 2018, the FASB issued ASU No. 2018-18, Collaborative Arrangements (ASC 808): Clarifying the Interaction between ASC 808 and ASC 606, which clarifies that certain transactions between collaborative arrangement participants should be accounted for as revenue under ASC 606 when the collaborative arrangement participant is a customer in the context of a unit of account. In those situations, all the guidance in ASC 606 should be applied, including recognition, measurement, presentation and disclosure requirements. ASU 2018-18 adds unit-of-account guidance in ASC 808 to align with the guidance in ASC 606 (that is, a distinct good or service) when an entity is assessing whether the collaborative arrangement or a part of the arrangement is within the scope of ASC 606, and requires that in a transaction with a collaborative arrangement participant that is not directly related to sales to third parties, presenting the transaction together with revenue recognized under ASC 606 is precluded if the collaborative arrangement participant is not a customer. ASU 2018-18 will be effective for the Company for fiscal years beginning after December 15, 2020, and interim periods within fiscal years beginning after December 15, 2021. The Company is currently assessing the impact of this ASU on its condensed consolidated financial statements. |
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- References No definition available.
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- Definition The entire disclosure for all significant accounting policies of the reporting entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Fair Value Measurements |
9 Months Ended |
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Sep. 30, 2019 | |
| Fair Value Disclosures [Abstract] | |
| Fair Value Measurements |
3. Fair Value Measurements Fair value accounting is applied for all financial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a recurring basis (at least annually). Financial instruments include cash and cash equivalents, accounts payable and accrued liabilities that approximate fair value due to their relatively short maturities. Assets and liabilities recorded at fair value on a recurring basis in the balance sheet are categorized based upon the level of judgment associated with the inputs used to measure their fair values. Fair value is defined as the exchange price that would be received for an asset or an exit price that would be paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The authoritative guidance on fair value measurements establishes a three-tier fair value hierarchy for disclosure of fair value measurements as follows: Level 1—Inputs are unadjusted, quoted prices in active markets for identical assets or liabilities at the measurement date; Level 2—Inputs are observable, unadjusted quoted prices in active markets for similar assets or liabilities, unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active, or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the related assets or liabilities; and Level 3—Unobservable inputs that are significant to the measurement of the fair value of the assets or liabilities that are supported by little or no market data. Financial assets subject to fair value measurements on a recurring basis comprise money market funds that are measured using Level 1 inputs. The money market funds subject to fair value measurements at September 30, 2019 and December 31, 2018 were $48.3 million and $63.8 million, respectively, and are included in cash and cash equivalents. |
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- References No definition available.
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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Property and Equipment |
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| Property and Equipment |
4. Property and Equipment
Property and equipment consisted of the following (in thousands):
Depreciation and amortization expenses were $0.3 million and $0.3 million for the three months ended September 30, 2019 and 2018, respectively, and $1.0 million and $0.9 million for the nine months ended September 30, 2019 and 2018, respectively. |
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- References No definition available.
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- Definition The entire disclosure for long-lived, physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, accounting policies and methodology, roll forwards, depreciation, depletion and amortization expense, including composite depreciation, accumulated depreciation, depletion and amortization expense, useful lives and method used, income statement disclosures, assets held for sale and public utility disclosures. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Accrued Expenses |
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| Payables And Accruals [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accrued Expenses |
5. Accrued Expenses Accrued expenses consist of the following (in thousands):
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- Definition The entire disclosure for accounts payable and accrued liabilities at the end of the reporting period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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Related-Party Promissory Notes |
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Sep. 30, 2019 | |
| Related Party Transactions [Abstract] | |
| Related-Party Promissory Notes |
6. Related-Party Promissory Notes In August 2015 and June 2016, the Company entered into limited recourse promissory notes with the Company’s chief executive officer and chief operating officer for the purchase of restricted common stock. The principal amount of the loan with the Company’s chief executive officer was $0.3 million (the “CEO Note”). The principal amount of the loan with the Company’s chief operating officer was $0.3 million (the “COO Note”). The loans were secured by the shares of common stock of the Company held by the individuals. The loans accrued interest at a rate of 1.82% and 1.41% per annum, respectively, and were due upon the earlier of voluntary termination of services to the Company, filing by the Company of its first registration statement with the SEC under the Securities Act of 1933, or sale of substantially all of the Company’s assets. As of December 31, 2018, the total outstanding balances under these notes, including accrued interest, were approximately $0.6 million. In June 2019, the Company forgave $0.4 million, which was the entire amount of principal and accrued interest due on the CEO Note.
In March 2018, the Board of Directors reduced the number of performance-based options of its former chief operating officer by 8,333 shares resulting in a $17,000 reduction to the principal of the COO Note. In March 2019, the chief operating officer resigned from the Company and, under the terms of a separation agreement, there were 63,019 vested shares and 28,645 unvested shares subject to repurchase. In March 2019, the Company reduced the principal on the COO Note by $0.1 million relating to the unvested shares, which shares were cancelled and returned to the option pool. In July 2019, the Company repurchased 29,686 vested shares from the chief operating officer in exchange for canceling $0.1 million of principal and interest on the COO Note. The Company received cash proceeds of $0.1 million as payment for the remaining principal and interest on the COO Notes relating to the remaining 33,333 vested shares. |
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- Definition Promissory notes to related parties. No definition available.
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- References No definition available.
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Convertible Preferred Stock and Stockholders Deficit |
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| Convertible Preferred Stock and Stockholders Deficit |
7. Convertible Preferred Stock and Stockholders’ Deficit Convertible preferred stock In June 2018, the Company closed a subsequent sale of Series C convertible preferred stock at $2.2925 per share for $29.9 million in gross proceeds. In December 2018, the Company closed the sale of Series C-2 convertible preferred stock at $2.2925 per share for $22.6 million in gross proceeds, and between January 2019 and June 2019, the Company closed additional sales of Series C-2 convertible preferred stock at $2.2925 per share for $14.4 million in gross proceeds. As of September 30, 2019, convertible preferred stock outstanding consisted of the following (in thousands, except share amounts):
As of December 31, 2018, convertible preferred stock consisted of the following (in thousands, except share amounts):
Immediately prior to the closing of the Company’s IPO on November 4, 2019, all outstanding shares of the Company’s convertible preferred stock converted into 17,467,184 shares of the Company’s common stock. |
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- Definition Temporary equity disclosure. No definition available.
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Common Stock |
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| Common Stock |
8. Common Stock The holders of the Company’s common stock have one vote for each share of common stock held by them. Holders of shares of the Company’s common stock are entitled to dividends when, as and if declared by the Board of Directors. No dividends had been declared as of September 30, 2019 or December 31, 2018. As of September 30, 2019 and December 31, 2018, 935,040 shares and 878,413 shares of common stock were outstanding, respectively. As of September 30, 2019, the Company had reserved the following shares of common stock, on an as-converted basis, for future issuance as follows:
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- Definition The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Stock Option Plan |
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| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Stock Option Plan |
9. Stock Option Plan
The Company’s 2019 Equity Incentive Plan (the “2019 Plan”) which was adopted by the Company’s Board of Directors on June 27, 2019 and approved by the Company’s stockholders on July 18, 2019, became effective upon the consummation of the IPO. Upon the effectiveness of the 2019 Plan, the Company’s 2015 Stock Plan (the “2015 Plan”) terminated and no further grants may be made thereunder. However, the 2015 Plan will continue to govern the terms and conditions of the outstanding awards previously granted thereunder. A summary of the Company’s stock option activity under the 2015 Plan for the nine months ended September 30, 2019 is as follows:
Employee stock option valuation The assumptions used to value employee and director stock option awards granted under the 2015 Plan during the three and nine months ended September 30, 2019 and 2018, using the Black-Scholes option pricing model, were as follows:
Stock options granted to nonemployees
Stock-based compensation related to stock options granted to non-employees is recognized as services are rendered. The assumptions used to value non-employee stock option awards granted under the 2015 Plan during the three and nine months ended September 30, 2019 and 2018, using the Black-Scholes option pricing model, were as follows:
Early exercise of stock options
The terms of the 2015 Plan permit option holders to exercise stock options before they are vested, subject to certain limitations. Such unvested shares are subject to repurchase by the Company at the original exercise price in the event the option holder’s service to the Company is terminated either voluntarily or involuntarily. As a result of early exercises under the 2015 Plan, approximately 0.1 million and 0.2 million shares were subject to repurchase as of September 30, 2019 and December 31, 2018, respectively. The Company treats cash received from the exercise of unvested options as a refundable deposit and classifies such amounts as a liability in its balance sheet. As of September 30, 2019 and December 31, 2018, the Company included cash received for the early exercise of unvested options of $0.1 million and $0.2 million, respectively, in other current liabilities. Amounts included in liabilities are transferred into common stock and additional paid-in capital as the shares vest, which is generally over a period of 48 months and may include a one-year cliff.
Stock-based compensation expense
Total stock-based compensation recognized for both employees and non-employees was as follows (in thousands):
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- Definition The entire disclosure for share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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Income Taxes |
9 Months Ended |
|---|---|
Sep. 30, 2019 | |
| Income Tax Disclosure [Abstract] | |
| Income Taxes |
10. Income Taxes
The Company did not record a provision for income taxes for the nine months ended September 30, 2019 and 2018 because all of its taxable income is expected to be fully offset by net operating losses generated in prior years. In addition, the Company’s deferred tax assets continue to be subject to a full valuation allowance. |
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- References No definition available.
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| X | ||||||||||
- Definition The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Net Loss Per Share |
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| Earnings Per Share [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net Loss Per Share |
11. Net Loss Per Share Net loss per share The following table sets forth the computation of the basic and diluted net loss per share for the nine months ended September 30, 2018 and 2019 (in thousands, except share and per share data):
Outstanding potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive
Immediately prior to the closing of the Company’s IPO on November 4, 2019, all outstanding shares of the Company’s convertible preferred stock converted into 17,467,184 shares of the Company’s common stock. For the nine months ended September 30, 2019, with the assumed conversion of the convertible preferred stock, the basic and diluted unaudited pro forma net loss was $1.69 per share. |
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- References No definition available.
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- Definition The entire disclosure for earnings per share. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Subsequent Events |
9 Months Ended |
|---|---|
Sep. 30, 2019 | |
| Subsequent Events [Abstract] | |
| Subsequent Events |
12. Subsequent Events On December 1, 2019, the Company entered into a Collaboration and License Agreement (“Agreement”) with Hanmi Pharmaceutical Co., LTD. for FLX475. Under the terms of the Agreement, the Company will receive $10.0 million in an upfront and expected near-term milestone payment. Additionally, the Company will be eligible to receive additional contingent payments of up to $108.0 million upon the achievement of specified milestones, consisting of up to $48.0 million upon the achievement of development milestones and up to $60.0 million upon the achievement of sales milestones, as well as double-digit royalties on future net sales of FLX475 in specified territories. |
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- References No definition available.
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- Definition The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Summary of Significant Accounting Policies (Policies) |
9 Months Ended |
|---|---|
Sep. 30, 2019 | |
| Accounting Policies [Abstract] | |
| Basis of Presentation |
Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) for interim financial information and pursuant to Article 10 of Regulation S-X of the Securities Act of 1933, as amended (Securities Act). Accordingly, they do not include all of the information and notes required by U.S. GAAP for complete financial statements. These unaudited condensed consolidated financial statements include only normal and recurring adjustments that the Company believes are necessary to fairly state the Company’s financial position and the results of its operations and cash flows. Interim-period results are not necessarily indicative of results of operations or cash flows for a full year or any subsequent interim period. The condensed balance sheet at December 31, 2018 has been derived from the audited financial statements at that date but does not include all disclosures required by U.S. GAAP for complete financial statements. Because all of the disclosures required by U.S. GAAP for complete financial statements are not included herein, these unaudited condensed consolidated financial statements and the notes accompanying them should be read in conjunction with the Company’s audited consolidated financial statements included in the Registration Statement on Form S-1 and related Prospectus dated October 30, 2019 filed with the SEC pursuant to Rule 424(b)(4) of the Securities Act of 1933, as amended (“Prospectus”). |
| Reverse Stock Split |
Reverse Stock Split On July 19, 2019, the Company filed an amendment to the Company’s amended and restated certificate of incorporation to effect a reverse split of shares of the Company’s common stock on a one-for-six basis (the “Reverse Stock Split”). In connection with the Reverse Stock Split, the conversion ratio for the Company’s outstanding convertible preferred stock was proportionately adjusted such that the common stock issuable upon conversion of such preferred stock was decreased in proportion to the Reverse Stock Split. The par value of the common stock was not adjusted as a result of the Reverse Stock Split. All references to common stock, options to purchase common stock, early exercised options, share data, per share data, convertible preferred stock (to the extent presented on an as-converted to common stock basis) and related information contained in these consolidated financial statements have been retrospectively adjusted to reflect the effect of the Reverse Stock Split for all periods presented. |
| Deferred Offering Costs |
Deferred Offering Costs Deferred offering costs consisting of direct legal, accounting, printing and other fees and costs related to the IPO are capitalized. The deferred offering costs were reclassified to additional paid-in capital upon the effectiveness of the IPO in November 2019. As of September 30, 2019, $2.8 million of deferred offering costs were capitalized and included in other assets. |
| Net Loss Per Share |
Net Loss Per Share Basic net loss per share is computed by dividing the net loss by the weighted average number of common shares outstanding during the period, without consideration of potential dilutive securities. Diluted net loss per common share is computed by dividing the net loss by the sum of the weighted average number of common shares outstanding during the period plus the potential dilutive effects of potential dilutive securities outstanding during the period calculated in accordance with the treasury stock method. Diluted net loss per share is the same as basic net loss per share since the effect of potentially dilutive securities is anti-dilutive. |
| Recent Accounting Pronouncements |
Recent Accounting Pronouncements
From time to time, new accounting pronouncements are issued by the Financial Accounting Standards Board (“FASB”) or other standard setting bodies and adopted by us as of the specified effective date. Unless otherwise discussed, the impact of recently issued standards that are not yet effective will not have a material impact on our condensed consolidated financial statements upon adoption. Under the Jumpstart Our Business Startups Act of 2012, as amended (the “JOBS Act”), we meet the definition of an emerging growth company, and have elected the extended transition period for complying with new or revised accounting standards pursuant to Section 107(b) of the JOBS Act. |
| Recently Issued Accounting Pronouncements Not Yet Adopted |
Recently Issued Accounting Pronouncement Not Yet Adopted
In February 2016, the FASB issued ASU No. 2016-02, Leases. ASU 2016-02 requires lessees to put most leases on their balance sheet while recognizing expense in a manner similar to existing accounting. ASU 2016-02 states that a lessee would recognize a lease liability for the obligation to make lease payments and a right-to-use asset for the right to use the underlying asset for the lease term. The new accounting guidance is effective for the Company for fiscal periods beginning after December 15, 2019 and early adoption is permitted. The Company is currently assessing the timing of adoption and the impact that the adoption will have on its consolidated financial statements and related disclosures.
In June 2016, the FASB issued ASU No. 2016-13 Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments. ASU 2016-13 amended guidance on reporting credit losses for assets held at amortized cost basis and available-for-sale debt securities. For available-for-sale debt securities, credit losses will be presented as an allowance rather than as a write-down. This standard is effective for the Company’s fiscal year beginning after December 31, 2020. Early adoption is permitted for all entities. The Company is currently assessing the timing of adoption and the impact that the adoption of ASU 2016-13 will have on its condensed consolidated financial statements and related disclosures.
In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230), which provides greater clarity to preparers on the treatment of certain items within an entity’s statement of cash flows. ASU 2016-15 is intended to reduce diversity in practice in how certain transactions are classified in the statement of cash flows. The guidance is effective for the Company on January 1, 2019, and the Company is currently evaluating the impact that the adoption of ASU 2016-15 will have on its consolidated financial statements and related disclosures.
In June 2018, the FASB issued ASU No. 2018-07, Compensation—Stock Compensation (Topic 718): Improvements to Non-Employee Share-Based Payment Accounting as part of the FASB simplification initiative. ASU 2018-07 expands the scope of Topic 718, allowing the Company to apply the requirements of Topic 718 to certain non-employee awards to acquire goods and services from non-employees. This ASU will be effective for the Company for fiscal years beginning after December 15, 2019, and interim periods within fiscal years beginning after December 15, 2020, with early adoption permitted. The Company is currently assessing the timing of adoption and the impact that the adoption of ASU 2018-07 will have on its consolidated financial statements and related disclosures.
In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurements (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement as part of the FASB’s disclosure framework project. ASU 2018-13 modifies the disclosure requirements on fair value measurements in Topic 820, Fair Value Measurement by removing the requirement to disclose amounts of and reasons for transfers between Level 1 and Level 2 of the fair value hierarchy, the policy for timing of transfers between levels, and the valuation process for Level 3 fair value measurements. This ASU also modifies existing disclosure requirements by clarifying that the measurement uncertainty disclosure is to communicate information about the uncertainty in measurement as of the reporting date, and it adds required disclosures for the changes in unrealized gains and losses for the period included in other comprehensive income for recurring Level 3 fair value measurements held at the end of the reporting period, and the range and weighted average of significant unobservable inputs used to develop Level 3 fair value measurements. This ASU will be effective for the Company for fiscal years and interim periods within those fiscal years, beginning after December 15, 2019. The Company is currently assessing the impact of this ASU on its consolidated financial statements.
In November 2018, the FASB issued ASU No. 2018-18, Collaborative Arrangements (ASC 808): Clarifying the Interaction between ASC 808 and ASC 606, which clarifies that certain transactions between collaborative arrangement participants should be accounted for as revenue under ASC 606 when the collaborative arrangement participant is a customer in the context of a unit of account. In those situations, all the guidance in ASC 606 should be applied, including recognition, measurement, presentation and disclosure requirements. ASU 2018-18 adds unit-of-account guidance in ASC 808 to align with the guidance in ASC 606 (that is, a distinct good or service) when an entity is assessing whether the collaborative arrangement or a part of the arrangement is within the scope of ASC 606, and requires that in a transaction with a collaborative arrangement participant that is not directly related to sales to third parties, presenting the transaction together with revenue recognized under ASC 606 is precluded if the collaborative arrangement participant is not a customer. ASU 2018-18 will be effective for the Company for fiscal years beginning after December 15, 2020, and interim periods within fiscal years beginning after December 15, 2021. The Company is currently assessing the impact of this ASU on its condensed consolidated financial statements. |
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- Definition Deferred offering costs policy. No definition available.
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- Definition Recently issued accounting pronouncements not yet adopted. No definition available.
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- Definition Reverse stock split policy. No definition available.
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- References No definition available.
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| X | ||||||||||
- Definition Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS). No definition available.
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| X | ||||||||||
- Definition Disclosure of accounting policy for computing basic and diluted earnings or loss per share for each class of common stock and participating security. Addresses all significant policy factors, including any antidilutive items that have been excluded from the computation and takes into account stock dividends, splits and reverse splits that occur after the balance sheet date of the latest reporting period but before the issuance of the financial statements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact. No definition available.
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Property and Equipment (Tables) |
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| Property Plant And Equipment [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Property and Equipment |
Property and equipment consisted of the following (in thousands):
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- References No definition available.
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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Accrued Expenses (Tables) |
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| Payables And Accruals [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Accrued Expenses |
Accrued expenses consist of the following (in thousands):
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- Definition Tabular disclosure of the components of accrued liabilities. No definition available.
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Convertible Preferred Stock and Stockholders Deficit (Tables) |
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| Temporary Equity Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Convertible Preferred Stock Outstanding |
As of September 30, 2019, convertible preferred stock outstanding consisted of the following (in thousands, except share amounts):
As of December 31, 2018, convertible preferred stock consisted of the following (in thousands, except share amounts):
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- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of temporary equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Common Stock (Tables) |
9 Months Ended | |||||||||||||||||||||||||||||||||||
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Sep. 30, 2019 | ||||||||||||||||||||||||||||||||||||
| Equity [Abstract] | ||||||||||||||||||||||||||||||||||||
| Summary of Reserved Shares of Common Stock on Converted Basis for Future Issuance |
As of September 30, 2019, the Company had reserved the following shares of common stock, on an as-converted basis, for future issuance as follows:
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- Definition Reserved shares of common stock for future issuance. No definition available.
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- References No definition available.
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Stock Option Plan (Tables) |
9 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Summary of Stock Option Activity | A summary of the Company’s stock option activity under the 2015 Plan for the nine months ended September 30, 2019 is as follows:
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| Summary of Stock-based Compensation Expense |
Total stock-based compensation recognized for both employees and non-employees was as follows (in thousands):
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| Summary of Assumptions Used to Value Stock Option Awards under 2015 Plan |
The assumptions used to value employee and director stock option awards granted under the 2015 Plan during the three and nine months ended September 30, 2019 and 2018, using the Black-Scholes option pricing model, were as follows:
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| Summary of Assumptions Used to Value Stock Option Awards under 2015 Plan | The assumptions used to value non-employee stock option awards granted under the 2015 Plan during the three and nine months ended September 30, 2019 and 2018, using the Black-Scholes option pricing model, were as follows:
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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Net Loss Per Share (Tables) |
9 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Computation of Basic and Diluted Net Loss per Share |
The following table sets forth the computation of the basic and diluted net loss per share for the nine months ended September 30, 2018 and 2019 (in thousands, except share and per share data):
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| Outstanding Potentially Dilutive Securities not Included in Diluted per Share Calculations |
Outstanding potentially dilutive securities that were not included in the diluted per share calculations because they would be anti-dilutive
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- References No definition available.
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| X | ||||||||||
- Definition Tabular disclosure of securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) in the future that were not included in the computation of diluted EPS because to do so would increase EPS amounts or decrease loss per share amounts for the period presented, by antidilutive securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Organization and Liquidity Risks - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |
Nov. 04, 2019 |
Sep. 30, 2019 |
Dec. 31, 2018 |
|---|---|---|---|
| Class Of Stock [Line Items] | |||
| Accumulated deficit | $ 148,734 | $ 118,953 | |
| Cash and cash equivalents | 48,310 | $ 63,798 | |
| Working capital | $ 45,800 | ||
| Subsequent Event | Common Stock | |||
| Class Of Stock [Line Items] | |||
| Conversion of convertible preferred stock, common stock shares issued | 17,467,184 | ||
| Subsequent Event | Initial Public Offering | |||
| Class Of Stock [Line Items] | |||
| Shares issued during period | 3,000,000 | ||
| Shares issued, price per share | $ 12.00 | ||
| Net proceeds received after deducting underwriting discounts and other offering related costs | $ 33,800 | ||
| Authorized shares of common stock | 500,000,000 | ||
| Common stock, par value | $ 0.0001 | ||
| Authorized shares of preferred stock | 50,000,000 | ||
| Preferred stock, par value | $ 0.0001 | ||
| Subsequent Event | Underwriters Exercised Option to Purchase at IPO | |||
| Class Of Stock [Line Items] | |||
| Shares issued during period | 427,360 |
| X | ||||||||||
- Definition Working capital. No definition available.
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| X | ||||||||||
- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Face amount or stated value per share of common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The maximum number of common shares permitted to be issued by an entity's charter and bylaws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cash inflow associated with the amount received from entity's first offering of stock to the public. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cumulative amount of the reporting entity's undistributed earnings or deficit. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Per share or per unit amount of equity securities issued. No definition available.
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- Definition Number of shares issued during the period as a result of the conversion of convertible securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Summary of Significant Accounting Policies - Additional Information (Details) $ in Millions |
9 Months Ended | |
|---|---|---|
Jul. 19, 2019 |
Sep. 30, 2019
USD ($)
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| Other Assets | ||
| Significant Accounting Policies [Line Items] | ||
| Deferred offering costs | $ 2.8 | |
| Common Stock | ||
| Significant Accounting Policies [Line Items] | ||
| Reverse stock split, description | On July 19, 2019, the Company filed an amendment to the Company’s amended and restated certificate of incorporation to effect a reverse split of shares of the Company’s common stock on a one-for-six basis (the “Reverse Stock Split”). In connection with the Reverse Stock Split, the conversion ratio for the Company’s outstanding convertible preferred stock was proportionately adjusted such that the common stock issuable upon conversion of such preferred stock was decreased in proportion to the Reverse Stock Split. The par value of the common stock was not adjusted as a result of the Reverse Stock Split. | |
| Reverse stock split, conversion ratio | 0.17 |
| X | ||||||||||
- Definition Significant accounting policies line items. No definition available.
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| X | ||||||||||
- Definition Specific incremental costs directly attributable to a proposed or actual offering of securities which are deferred at the end of the reporting period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Description of the reverse stock split arrangement. Also provide the retroactive effect given by the reverse split that occurs after the balance sheet date but before the release of financial statements. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Fair Value Measurements - Additional Information (Details) - USD ($) $ in Millions |
Sep. 30, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Recurring | Level 1 | Cash and Cash Equivalents | ||
| Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] | ||
| Money market fund, fair value | $ 48.3 | $ 63.8 |
| X | ||||||||||
- Definition Money market fund at fair value. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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Property and Equipment - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands |
Sep. 30, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Property Plant And Equipment [Line Items] | ||
| Total property and equipment | $ 9,836 | $ 9,128 |
| Less accumulated depreciation and amortization | (5,834) | (4,969) |
| Property and equipment, net | 4,002 | 4,159 |
| Laboratory Equipment | ||
| Property Plant And Equipment [Line Items] | ||
| Total property and equipment | 5,832 | 5,466 |
| Leasehold Improvements | ||
| Property Plant And Equipment [Line Items] | ||
| Total property and equipment | 3,294 | 2,989 |
| Computer Equipment | ||
| Property Plant And Equipment [Line Items] | ||
| Total property and equipment | 316 | 308 |
| Furniture and Fixtures | ||
| Property Plant And Equipment [Line Items] | ||
| Total property and equipment | $ 394 | $ 365 |
| X | ||||||||||
- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Property and Equipment - Additional Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
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| Property Plant And Equipment [Abstract] | ||||
| Depreciation and amortization expenses | $ 300 | $ 300 | $ 1,011 | $ 943 |
| X | ||||||||||
- Definition The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
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Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($) $ in Thousands |
Sep. 30, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Payables And Accruals [Abstract] | ||
| Accrued clinical expenses | $ 973 | $ 519 |
| Accrued compensation | 1,604 | 1,433 |
| Accrued professional and consulting services | 662 | 182 |
| Accrued property and equipment | 202 | |
| Accrued lab supplies | 78 | 80 |
| Other | 93 | 72 |
| Total accrued expenses | $ 3,410 | $ 2,488 |
| X | ||||||||||
- Definition Accrued clinical expenses current. No definition available.
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- Definition Accrued lab supplies current. No definition available.
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| X | ||||||||||
- Definition Accrued property and equipment current. No definition available.
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for professional fees, such as for legal and accounting services received. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of expenses incurred but not yet paid classified as other, due within one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of obligations and payables pertaining to claims incurred of a workers compensation nature. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Forgiveness of principal amount and accrued interest due on note. No definition available.
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- Definition Number of remaining vested shares issued. No definition available.
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| X | ||||||||||
- Definition Number of vested shares repurchased. No definition available.
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| X | ||||||||||
- Definition Principal and interest on promissory note cancelled for repurchase of vested shares. No definition available.
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- Definition Proceeds from remaining number of vested shares. No definition available.
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| X | ||||||||||
- Definition Share based compensation arrangement by share based payment award options non vested shares subject to repurchase. No definition available.
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| X | ||||||||||
- Definition Share based compensation arrangement by share based payment award options vested shares subject to repurchase. No definition available.
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| X | ||||||||||
- Definition The increase (decrease) during the reporting period in the amount owed to the reporting entity in the form of loans and obligations (generally evidenced by promissory notes) made to the following types of related parties: a parent company and its subsidiaries; subsidiaries of a common parent; an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management, an entity and its principal owners, management, or member of their immediate families, affiliates, or other parties with the ability to exert significant influence. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition For an unclassified balance sheet, amounts due from parties associated with the reporting entity as evidenced by a written promise to pay. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The principal amount of the receivable or note before consideration of the discount or premium. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties. No definition available.
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- Definition The increase or decrease in number of shares reserved for issuance under stock option agreements awarded under the plan that validly exist and are outstanding, including vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Convertible Preferred Stock and Stockholders' Deficit - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands |
1 Months Ended | 6 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|---|
Nov. 04, 2019 |
Dec. 31, 2018 |
Jun. 30, 2018 |
Jun. 30, 2019 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Temporary Equity [Line Items] | ||||||
| Proceeds from the sale of convertible preferred stock, net of issuance costs | $ 14,379 | $ 29,914 | ||||
| Subsequent Event | Common Stock | ||||||
| Temporary Equity [Line Items] | ||||||
| Conversion of convertible preferred stock, common stock shares issued | 17,467,184 | |||||
| Series C Convertible Preferred Stock | ||||||
| Temporary Equity [Line Items] | ||||||
| Shares issued, price per share | $ 2.2925 | |||||
| Proceeds from the sale of convertible preferred stock, net of issuance costs | $ 29,900 | |||||
| Series C-2 Convertible Preferred Stock | ||||||
| Temporary Equity [Line Items] | ||||||
| Shares issued, price per share | $ 2.2925 | $ 2.2925 | ||||
| Proceeds from the sale of convertible preferred stock, net of issuance costs | $ 22,600 | $ 14,400 | ||||
| X | ||||||||||
- Definition The cash inflow from issuance of preferred stocks identified as being convertible into another form of financial instrument, typically the entity's common stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Per share or per unit amount of equity securities issued. No definition available.
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| X | ||||||||||
- Definition Number of shares issued during the period as a result of the conversion of convertible securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Definition Carrying amount, attributable to parent, of an entity's issued and outstanding stock which is not included within permanent equity. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. Includes stock with a put option held by an ESOP and stock redeemable by a holder only in the event of a change in control of the issuer. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition The aggregate liquidation preference (or restrictions) of stock classified as temporary equity that has a preference in involuntary liquidation considerably in excess of the par or stated value of the shares. The liquidation preference is the difference between the preference in liquidation and the par or stated values of the share. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The maximum number of securities classified as temporary equity that are permitted to be issued by an entity's charter and bylaws. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The number of securities classified as temporary equity that have been sold (or granted) to the entity's shareholders. Securities issued include securities outstanding and securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The number of securities classified as temporary equity that have been issued and are held by the entity's shareholders. Securities outstanding equals securities issued minus securities held in treasury. Temporary equity is a security with redemption features that are outside the control of the issuer, is not classified as an asset or liability in conformity with GAAP, and is not mandatorily redeemable. Includes any type of security that is redeemable at a fixed or determinable price or on a fixed or determinable date or dates, is redeemable at the option of the holder, or has conditions for redemption which are not solely within the control of the issuer. If convertible, the issuer does not control the actions or events necessary to issue the maximum number of shares that could be required to be delivered under the conversion option if the holder exercises the option to convert the stock to another class of equity. If the security is a warrant or a rights issue, the warrant or rights issue is considered to be temporary equity if the issuer cannot demonstrate that it would be able to deliver upon the exercise of the option by the holder in all cases. Includes stock with put option held by ESOP and stock redeemable by holder only in the event of a change in control of the issuer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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Common Stock - Additional Information (Details) |
9 Months Ended | 12 Months Ended |
|---|---|---|
|
Sep. 30, 2019
USD ($)
vote
shares
|
Dec. 31, 2018
USD ($)
shares
|
|
| Equity [Abstract] | ||
| Number of votes for each share of common stock | The holders of the Company’s common stock have one vote for each share of common stock held by them | |
| Number of votes per share | vote | 1 | |
| Dividends declared | $ | $ 0 | $ 0 |
| Common stock shares outstanding | shares | 935,040 | 878,413 |
| X | ||||||||||
- Definition Common stock number of votes per share. No definition available.
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| X | ||||||||||
- Definition Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Description of voting rights of common stock. Includes eligibility to vote and votes per share owned. Include also, if any, unusual voting rights. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of paid and unpaid common stock dividends declared with the form of settlement in cash, stock and payment-in-kind (PIK). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- References No definition available.
|
Common Stock - Summary of Reserved Shares of Common Stock on Converted Basis for Future Issuance (Detail) |
Sep. 30, 2019
shares
|
|---|---|
| Class Of Stock [Line Items] | |
| Total shares reserved | 18,872,698 |
| Series A Convertible Preferred Stock | |
| Class Of Stock [Line Items] | |
| Total shares reserved | 6,251,502 |
| Series B Convertible Preferred Stock | |
| Class Of Stock [Line Items] | |
| Total shares reserved | 4,166,663 |
| Series C Convertible Preferred Stock | |
| Class Of Stock [Line Items] | |
| Total shares reserved | 4,351,554 |
| Series C-2 Convertible Preferred Stock | |
| Class Of Stock [Line Items] | |
| Total shares reserved | 2,697,465 |
| Options Issued and Outstanding | |
| Class Of Stock [Line Items] | |
| Total shares reserved | 943,610 |
| Options Available for Future Grants | |
| Class Of Stock [Line Items] | |
| Total shares reserved | 461,904 |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Aggregate number of common shares reserved for future issuance. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Details
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- Details
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- Details
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| X | ||||||||||
- Definition Share based compensation arrangement by share based payment awards forfeited. No definition available.
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| X | ||||||||||
- Definition Share based compensation arrangement by share based payment awards granted. No definition available.
|
| X | ||||||||||
- Definition Share based compensation arrangement by share based payment awards unvested common shares repurchased. No definition available.
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| X | ||||||||||
- Definition Share-based compensation arrangements by share-based payment award, options, unvested common shares repurchased in period, weighted average exercise price. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
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| X | ||||||||||
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average price at which option holders acquired shares when converting their stock options into shares. No definition available.
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| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
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| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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| X | ||||||||||
- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of share options (or share units) exercised during the current period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Share-based compensation arrangement by share-based payment award, fair value assumptions, fair value of common stock. No definition available.
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- Definition The estimated measure of the maximum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. No definition available.
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| X | ||||||||||
- Definition The estimated measure of the minimum percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. No definition available.
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| X | ||||||||||
- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The maximum risk-free interest rate assumption that is used in valuing an option on its own shares. No definition available.
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| X | ||||||||||
- Definition The minimum risk-free interest rate assumption that is used in valuing an option on its own shares. No definition available.
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Stock Option Plan - Additional Information (Details) - 2015 Stock Plan - USD ($) shares in Millions, $ in Millions |
9 Months Ended | |
|---|---|---|
Sep. 30, 2019 |
Dec. 31, 2018 |
|
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
| Shares not vested and subject to repurchase | 0.1 | 0.2 |
| Cash received from early exercise of unvested options | $ 0.1 | $ 0.2 |
| Award vesting period | 48 months |
| X | ||||||||||
- Definition Aggregate carrying value as of the balance sheet date of the liabilities for stock option plans and other equity-based compensation arrangements. No definition available.
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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- Details
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Stock Option Plan - Summary of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||||
| Total stock-based compensation expense | $ 431 | $ 295 | $ 1,155 | $ 874 |
| Research and Development | ||||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||||
| Total stock-based compensation expense | 212 | 131 | 611 | 404 |
| General and Administrative | ||||
| Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items] | ||||
| Total stock-based compensation expense | $ 219 | $ 164 | $ 544 | $ 470 |
| X | ||||||||||
- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
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- Details
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| X | ||||||||||
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Income Taxes - Additional Information (Details) - USD ($) |
9 Months Ended | |
|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Income Tax Disclosure [Abstract] | ||
| Provision for income taxes | $ 0 | $ 0 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
Net Loss Per Share - Computation of Basic and Diluted Net Loss per Share (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Numerator: | ||||||||
| Net loss | $ 9,971 | $ 10,622 | $ 9,188 | $ 10,284 | $ 8,204 | $ 8,232 | $ 29,781 | $ 26,717 |
| Denominator: | ||||||||
| Weighted average common shares outstanding | 838,961 | 867,565 | 822,644 | 864,855 | ||||
| Less: weighted-average unvested common stock subject to repurchase | (16,635) | (96,251) | (35,482) | (121,750) | ||||
| Weighted-average shares used to compute net loss per share, basic and diluted | 803,229 | 646,800 | 741,711 | 592,237 | ||||
| Net loss per share, basic and diluted | $ 12.41 | $ 15.90 | $ 40.15 | $ 45.11 | ||||
| Restricted Stock | ||||||||
| Denominator: | ||||||||
| Less: weighted-average unvested common stock subject to repurchase | (19,097) | (124,514) | (45,451) | (150,868) | ||||
| X | ||||||||||
- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Average number of shares or units issued and outstanding that are used in calculating basic and diluted earnings per share (EPS). No definition available.
|
| X | ||||||||||
- Definition Number of shares of common stock subject to repurchase or cancellation determined by relating the portion of time within a reporting period that these shares have been outstanding to the total time in that period. Common stock subject to repurchase are outstanding common shares that are contingently returnable (that is, subject to recall). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition This element represents the weighted average total number of shares issued throughout the period including the first (beginning balance outstanding) and last (ending balance outstanding) day of the period before considering any reductions (for instance, shares held in treasury) to arrive at the weighted average number of shares outstanding. Weighted average relates to the portion of time within a reporting period that common shares have been issued and outstanding to the total time in that period. Such concept is used in determining the weighted average number of shares outstanding for purposes of calculating earnings per share (basic). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Details
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Net Loss Per Share - Outstanding Potentially Dilutive Securities not Included in Diluted per Share Calculations (Details) - shares |
9 Months Ended | |
|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
|
| Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | ||
| Outstanding potentially dilutive securities | 105,746,935 | 89,386,874 |
| Convertible Preferred Stock | ||
| Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | ||
| Outstanding potentially dilutive securities | 104,803,325 | 88,618,468 |
| Common Stock Options Issued and Outstanding | ||
| Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | ||
| Outstanding potentially dilutive securities | 943,610 | 768,406 |
| X | ||||||||||
- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
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- Details
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| X | ||||||||||
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Net Loss Per Share - Additional Information (Details) - Common Stock - $ / shares |
9 Months Ended | |
|---|---|---|
Nov. 04, 2019 |
Sep. 30, 2019 |
|
| Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | ||
| Basic and diluted unaudited pro forma net loss per share | $ 1.69 | |
| Subsequent Event | ||
| Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] | ||
| Conversion of convertible preferred stock, common stock shares issued | 17,467,184 |
| X | ||||||||||
- Definition Unaudited pro forma basic and diluted net income loss per share. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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| X | ||||||||||
- Definition Number of shares issued during the period as a result of the conversion of convertible securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Subsequent Events - Additional Information (Details) - Collaboration and License Agreement - Hanmi Pharmaceutical Co., LTD - Subsequent Event |
Dec. 01, 2019
USD ($)
|
|---|---|
| Subsequent Event [Line Items] | |
| Upfront and expected near-term milestone payment | $ 10,000,000 |
| Maximum | |
| Subsequent Event [Line Items] | |
| Development milestone payment upon achievement | 48,000,000 |
| Sales milestone payment upon achievement | 60,000,000 |
| Additional contingent payments upon Achievement of specified milestones | $ 108,000,000 |
| X | ||||||||||
- Definition Additional contingent payments upon achievement of specified milestones. No definition available.
|
| X | ||||||||||
- Definition Development milestone payment upon achievement. No definition available.
|
| X | ||||||||||
- Definition Sales milestone payment upon achievement. No definition available.
|
| X | ||||||||||
- Definition Upfront milestone payment. No definition available.
|
| X | ||||||||||
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. No definition available.
|
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