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Stockholder's Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based payment | $ 881 | $ 932
Stock options exercised (in shares) | 230 |
Stock options cancelled (in shares) | 193 |
Stock Options |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based payment | $ 859 | $ 924
Unrecognized compensation expense | $ 2,713 |
Weighted-average period of recognition | 2 years 1 month 13 days |
Shares issued (in shares) | 23,000 |
Restricted stock surrendered (in shares) | 14,000 |
Stock options granted (in shares) | 0 | 496,000
Stock options expired (in shares) | 170,000 |
Stock options outstanding (in shares) | 1,727,000 |
Stock options outstanding, weighted average exercise price (in USD per share) | $ 10.23 |
Stock options exercisable (in shares) | 771,000 |
Exercisable stock options, weighted average exercise price (in USD per share) | $ 10.36 |
Stock Options | President And Chief Executive Officer |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Compensation cost (reduction of cost) | $ (85) |
Stock Options | Employees |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Compensation cost (reduction of cost) | (81) |
Employee Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based payment | 22 | $ 8
Employee Stock | ESPP Plan |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Share-based payment | $ 22 | $ 8
Percentage of Company's common stock share price | 85.00% |
Stock options issued ESPP (in shares) | 22,000 | 0
Restricted Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unrecognized compensation expense | $ 2,756 |
Weighted-average period of recognition | 1 year 11 months 26 days |
Restricted stock surrendered (in shares) | 0 |
Restricted stock (in shares) | 0 |
Restricted stock award, forfeitures, less than (in shares) | 60,000 |
Restricted stock vested (in shares) | 68,000 |
Restricted stock outstanding (in shares) | 362,000 |
Unvested outstanding options (in shares) | 0 |
Restricted Stock | President And Chief Executive Officer |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Compensation cost (reduction of cost) | $ 186 |
Restricted Stock | Employees |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Compensation cost (reduction of cost) | $ 57 |
Performance-Based or Market-Based Shares |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Unvested outstanding options (in shares) | 0 |

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