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Net Loss per Share of Common Stock - Summary of Potentially Anti-dilutive Securities Excluded from Computation of Diluted Shares Outstanding (Detail) - shares
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Options to purchase common stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potentially Anti-dilutive securities excluded from computation of diluted shares outstanding 2,540,737 2,174,159
Restricted Stock Units [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Potentially Anti-dilutive securities excluded from computation of diluted shares outstanding   90,620