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Stock-Based Compensation - stock option activity (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Number of options |  |
Outstanding at the beginning (in shares) | 1,801,263 |
Granted (in shares) | 1,452,462 | 343,169
Exercised (in shares) | (117,847) |
Repurchased (in shares) | (276,334) |
Outstanding at the end (in shares) | 2,859,544 | 1,801,263
Vested and exercisable (in shares) | 1,102,543 |
Vested and expected to vest (in shares) | 2,859,544 |
Weighted Average Exercise Price per Share |  |
Weighted Average Exercise Price per Share Outstanding at the beginning (in dollars per share) | $ 3.01 |
Weighted Average Exercise Price per Share Granted (in dollars per share) | 10.07 |
Weighted Average Exercise Price per Share Exercised (in dollars per share) | 3.01 |
Weighted Average Exercise Price per Share Repurchased (in dollars per share) | 3.58 |
Weighted Average Exercise Price per Share Outstanding at the end (in dollars per share) | 6.55 | $ 3.01
Weighted Average Exercise Price per Share Vested and Exercisable (in dollars per share) | 3.01 |
Weighted Average Exercise Price per Share Vested and Expected to Vest exercisable (in dollars per share) | $ 6.55 |
Weighted Average Remaining Contractual Contractual Term |  |
Weighted Average Remaining Contractual Term (in years) | 8 years 3 months 18 days |
Weighted Average Remaining Contractual Term, Vested and exercisable (in Years) | 7 years 1 month 20 days |
Weighted Average Remaining Contractual Term, Vested and expected to vest (in Years) | 8 years 3 months 18 days |
Aggregate Intrinsic Value |  |
Aggregate Intrinsic Value Outstanding | $ 27,615,466 |
Aggregate Intrinsic Value Vested and exercisable | 14,507,723 |
Aggregate Intrinsic Value Vested and expected to vest | $ 27,615,466 |

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