Summary of Unvested Stock Option Activity (Detail) - $ / shares shares in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Sep. 30, 2021 |
Sep. 30, 2020 |
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| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Granted | $ 0.49 | $ 0 | $ 0.72 | $ 0.29 |
| Stock Options | ||||
| Share Based Compensation Arrangement By Share Based Payment Award [Line Items] | ||||
| Beginning Balance | 1,323 | |||
| Granted | 50 | |||
| Vested | (1,256) | |||
| Ending Balance | 117 | 117 | ||
| Beginning Balance | $ 0.34 | |||
| Granted | 0.72 | |||
| Vested | 0.31 | |||
| Ending Balance | $ 0.73 | $ 0.73 | ||
| 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 Weighted average grant-date fair value of non-vested options outstanding. No definition available.
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- 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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| X | ||||||||||
- Details
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