Summary of Unvested Stock Option Activity (Detail) - $ / shares shares in Thousands |
9 Months Ended | |
|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
| Granted | $ 0.29 | $ 1.53 |
| Stock Options | ||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||
| Beginning Balance | 254 | |
| Granted | 1,242 | |
| Vested | (137) | |
| Forfeited or cancelled | (15) | |
| Ending Balance | 1,344 | |
| Beginning Balance | $ 1.44 | |
| Granted | 0.29 | |
| Vested | 1.46 | |
| Forfeited or cancelled | 2.56 | |
| Ending Balance | $ 0.37 | |
| 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 Gross number of share options (or share units) granted during the period. No definition available.
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| X | ||||||||||
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of non-vested options outstanding. No definition available.
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- Definition Number of non-vested options forfeited. No definition available.
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| X | ||||||||||
- Definition Weighted average grant-date fair value of non-vested options forfeited. No definition available.
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| X | ||||||||||
- Definition Weighted average grant-date fair value of non-vested options outstanding. No definition available.
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| X | ||||||||||
- Definition Number of options vested. No definition available.
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| X | ||||||||||
- Definition Weighted average grant-date fair value of options vested. No definition available.
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- Details
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