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Summary of Significant Accounting Policies - Net Loss Per Share (Details) - shares
6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Anti-dilutive securities    
Anti-dilutive securities excluded from the calculation of diluted net loss per share (in shares) 2,130,653 311,400
Common stock warrants    
Anti-dilutive securities    
Anti-dilutive securities excluded from the calculation of diluted net loss per share (in shares) 1,834,584 46,250
Unvested restricted stock units    
Anti-dilutive securities    
Anti-dilutive securities excluded from the calculation of diluted net loss per share (in shares) 7,125 6,342
Common stock options    
Anti-dilutive securities    
Anti-dilutive securities excluded from the calculation of diluted net loss per share (in shares) 288,944 258,808