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Net Loss Per Share - Summary of Potentially Dilutive Shares of Common Stock (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 164,291 168,695 164,291 168,695
Outstanding stock options        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 30,890 32,833 30,890 32,833
Warrants to purchase common stock        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 133,401 135,862 133,401 135,862