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Stock-Based Compensation - 2020 Employee Stock Purchase Plan (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 USD ($) shares | Mar. 31, 2021 USD ($) | Dec. 31, 2020 item
Stock-Based Compensation |  |  |
Percent of common stock at fair market value to be exercised | 100.00% |  |
Stock-based compensation expense | $ | $ 4,965 | $ 3,208 |
Employee stock purchase plan contingently issuable |  |  |
Stock-Based Compensation |  |  |
Percentage of eligible earnings withheld |  |  | 15.00%
Percent of common stock at fair market value to be exercised |  |  | 85.00%
Number of months for each purchase period |  |  | 6 months
Number of purchase periods | item |  |  | 2
Common stock reserved for issuance | shares | 430,416 |  |
Stock-based compensation expense | $ | $ 100 | $ 100 |
Employee stock purchase plan contingently issuable | Maximum |  |  |
Stock-Based Compensation |  |  |
Offering period |  |  | 27 months
2022 Inducement Plan |  |  |
Stock-Based Compensation |  |  |
Common stock reserved for issuance | shares | 2,000,000 |  |

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