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Net Loss per Share - Schedule of Potentially Dilutive Securities Outstanding Excluded from Computations of Diluted Weighted-Average Shares Outstanding (Detail) - shares
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computations of diluted weighted-average shares outstanding 21,765,365 4,042,145
Warrants Issued to 2010/2012 Convertible Note Holders to Purchase Common Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computations of diluted weighted-average shares outstanding 6,804 6,804
Options to Purchase Common Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computations of diluted weighted-average shares outstanding 2,300,412 686,816
Outstanding Restricted Stock Units [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computations of diluted weighted-average shares outstanding 424,244 19,068
Warrants Issued to Underwriter to Purchase Common Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computations of diluted weighted-average shares outstanding 1,100 1,100
2018 PIPE Warrants [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computations of diluted weighted-average shares outstanding 34,241 34,241
March 2022 Common Warrants [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computations of diluted weighted-average shares outstanding 2,130,656 4,000,000
May 2023 Tranche A Warrants [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computations of diluted weighted-average shares outstanding 2,867,908  
May 2023 Tranche B Warrants [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computations of diluted weighted-average shares outstanding 14,000,000