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Summary of Significant Accounting Policies - Antidilutive Securities (Details) - shares
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Net Loss Per Share    
Antidilutive securities excluded from the calculation of basic and diluted loss per share (in shares) 9,461,252 10,934,858
Options to purchase Common Stock    
Net Loss Per Share    
Antidilutive securities excluded from the calculation of basic and diluted loss per share (in shares) 6,652,427 5,101,572
Warrants to purchase Common Stock    
Net Loss Per Share    
Antidilutive securities excluded from the calculation of basic and diluted loss per share (in shares) 2,807,948 4,490,159
Series A Convertible Preferred Stock    
Net Loss Per Share    
Antidilutive securities excluded from the calculation of basic and diluted loss per share (in shares) 877 877
Series E Convertible Preferred Stock    
Net Loss Per Share    
Antidilutive securities excluded from the calculation of basic and diluted loss per share (in shares) 0 1,342,250