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Net Loss per Share - Summary of Securities Not Included in Diluted Per Share Calculations (Detail) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities not included in the diluted per share calculations, amount 18,710,376 13,064,920 18,710,376 13,064,920
Option to Purchase Common Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities not included in the diluted per share calculations, amount 2,401,734 1,554,909 2,401,734 1,554,909
Warrants to Purchase Common Stock [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities not included in the diluted per share calculations, amount 11,350,011 11,510,011 11,350,011 11,510,011
Preferred Investment Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities not included in the diluted per share calculations, amount 4,958,631 0 4,958,631 0