Summary of Option Activity (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2021 |
Dec. 31, 2020 |
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| Equity [Abstract] | ||
| Beginning Balance | 2,398 | |
| Granted at fair market value | 20 | |
| Forfeited, cancelled, or expired | (9) | |
| Ending Balance | 2,409 | 2,398 |
| Options exercisable at March 31, 2021 | 1,083 | |
| Beginning Balance | $ 2.96 | |
| Granted at fair market value | 1.29 | |
| Forfeited, cancelled, or expired | 1.88 | |
| Ending Balance | 2.95 | $ 2.96 |
| Options exercisable at March 31, 2021 | $ 6.01 | |
| Weighted-Average Remaining Contractual Term (Years) | ||
| Options outstanding | 6 years 10 months 24 days | 7 years 2 months 12 days |
| Options exercisable | 4 years 3 months 18 days | |
| Options outstanding | $ 589 | $ 53 |
| Options exercisable | $ 2 |
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- Definition Share based compensation arrangement by share based payment award options grants in period at fair market value. No definition available.
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- Definition Share based compensation arrangement by share based payment award options weighted average remaining contractual term. No definition available.
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- Definition Share based compensation arrangements by share based payment award options grants in period weighted average exercise price at fair market value. No definition available.
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- References No definition available.
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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition For presentations that combine terminations, 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 or that expired. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average price of options that were either forfeited or expired. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- 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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- 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 Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, 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 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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