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Net Loss per Share (Details) - shares
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Anti-dilutive securities    
Anti-dilutive securities (in shares) 11,524,655 8,600,223
Stock options    
Anti-dilutive securities    
Anti-dilutive securities (in shares) 10,028,741 7,478,289
Unvested restricted stock units    
Anti-dilutive securities    
Anti-dilutive securities (in shares) 1,456,440 1,082,460
Warrants    
Anti-dilutive securities    
Anti-dilutive securities (in shares) 39,474 39,474