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Stock-Based Compensation - Narrative (Details) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 USD ($) shares | Sep. 30, 2021 office $ / shares shares | Jun. 30, 2022 USD ($) $ / shares shares | Dec. 31, 2021 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock options granted (in shares) | shares |  | 50,000 | 0 |
Exercise price of stock options granted (in dollars per share) | $ / shares |  | $ 1.08 | $ 0 |
Stock option forfeited (in shares) | shares | 12,500 |  |  |
Aggregate intrinsic value of options exercised | $ |  |  | $ 374 |
Fair value of options vested | $ |  |  | $ 16 |
Options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting period of award |  | 1 year |  |
Number of equal monthly installments | office |  | 12 |  |
2018 Stock Option and Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Issuance of common stock shares (in shares) | shares |  |  | 897,229 |
Common stock reserved for issuance (in shares) | shares | 3,582,435 |  | 3,582,435 | 762,038
Unrecognized stock compensation expense | $ | $ 4,588,000 |  | $ 4,588,000 |
Weighed-average period of costs amortized |  |  | 2 years 3 months 18 days |
2018 Employee Stock Purchase Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Common stock reserved for issuance (in shares) | shares | 911,245 |  | 911,245 | 189,215
Unrecognized stock compensation expense | $ | $ 293,000 |  | $ 293,000 |
Weighed-average period of costs amortized |  |  | 1 year 3 months 18 days |
2009 Stock Option and Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized stock compensation expense | $ | $ 2,000 |  | $ 2,000 |
Weighed-average period of costs amortized |  |  | 10 months 24 days |

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