Cash Proceeds Along with Fair Value Disclosures Related to Grants, Exercises and Vested Options (Detail) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 9 Months Ended | |
|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
| Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] | |||
| Proceeds from stock options exercised | $ 3 | ||
| Weighted-average fair value of options granted during period | $ 0.29 | $ 1.53 | |
| Total fair value of shares vested during the period | $ 34 | $ 188 | $ 683 |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount of cash inflow from exercise of option under share-based payment arrangement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| 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
|
| X | ||||||||||
- Definition Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|