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Stockholders' Equity - Restricted Stock and Restricted Stock Units (Details) - USD ($) $ / shares in Units, $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2022 | Jun. 30, 2021
Restricted Stock |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of shares issued | 1,061,175 | 300,450
Value of shares issued | $ 973 | $ 478
Weighted average estimated fair value | $ 0.92 | $ 1.59
Restricted Stock | Minimum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting terms (years) | 1 year |
Restricted Stock | Maximum |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Vesting terms (years) | 4 years |
Restricted Stock Units |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of shares issued | 1,379,860 | 458,245
Value of shares issued | $ 1,265 | $ 729
Vesting terms (years) | 1 year |

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