Net Loss (Income) Per Share of Common Stock - Schedule of Antidilutive Securities Excluded from Computation of Diluted Weighted Average Shares Outstanding (Detail) - shares |
9 Months Ended | |
|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Potentially antidilutive securities outstanding excluded from the computation of diluted weighted average shares | 13,877,284 | 14,219,211 |
| Employee Stock Options [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Potentially antidilutive securities outstanding excluded from the computation of diluted weighted average shares | 2,950,551 | 1,864,631 |
| Warrants [Member] | ||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||
| Potentially antidilutive securities outstanding excluded from the computation of diluted weighted average shares | 10,926,733 | 12,354,580 |