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Stock-Based Compensation - stock option activity (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Number of options    
Outstanding at the beginning (in shares) 2,859,544  
Granted (in shares) 942,025  
Exercised (in shares) (63,100)  
Cancelled (in shares) (22,513)  
Outstanding at the end (in shares) 3,715,956 2,859,544
Vested and exercisable (in shares) 1,163,564  
Vested and expected to vest (in shares) 3,715,956  
Weighted Average Exercise Price per Share    
Weighted Average Exercise Price per Share Outstanding at the beginning (in dollars per share) $ 6.55  
Weighted Average Exercise Price per Share Granted (in dollars per share) 10.10  
Weighted Average Exercise Price per Share Exercised (in dollars per share) 3.01  
Weighted Average Exercise Price per Share Cancelled (in dollars per share) 7.00  
Weighted Average Exercise Price per Share Outstanding at the end (in dollars per share) 7.50 $ 6.55
Weighted Average Exercise Price per Share Vested and Exercisable (in dollars per share) 3.24  
Weighted Average Exercise Price per Share Vested and Expected to Vest exercisable (in dollars per share) $ 7.50  
Weighted Average Remaining Contractual Contractual Term    
Weighted Average Remaining Contractual Term (in years)   8 years 3 months 18 days
Weighted Average Remaining Contractual Term Repurchased (in Years) 8 years 5 months 23 days  
Weighted Average Remaining Contractual Term, Vested and exercisable (in Years) 7 years 29 days  
Weighted Average Remaining Contractual Term, Vested and expected to vest (in Years) 8 years 5 months 23 days  
Aggregate Intrinsic Value    
Aggregate Intrinsic Value Outstanding $ 5,289,348  
Aggregate Intrinsic Value Vested and exercisable 3,879,198  
Aggregate Intrinsic Value Vested and expected to vest $ 5,289,348