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Summary of Significant Accounting Policies - Securities (Details) - shares
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Class of Stock [Line Items]    
Anti-dilutive securities excluded from computation (in shares) 3,173,725 2,938,494
Warrants to purchase common stock    
Class of Stock [Line Items]    
Anti-dilutive securities excluded from computation (in shares) 409,108 426,827
Common stock options    
Class of Stock [Line Items]    
Anti-dilutive securities excluded from computation (in shares) 1,949,374 2,123,617
Restricted stock units    
Class of Stock [Line Items]    
Anti-dilutive securities excluded from computation (in shares) 784,940 375,525
Employee stock purchase plan    
Class of Stock [Line Items]    
Anti-dilutive securities excluded from computation (in shares) 30,303 12,525