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Stockholder's Equity - Schedule of Common Stock Reserved for Future Issuance (Detail) - shares | Sep. 30, 2023 | Dec. 31, 2022
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Class Of Stock [Line Items] |  |
Common stock reserved | 9,335,202 | 8,152,093
Common stock reserved | 1,743,618 |
Common stock reserved | 47,045,096 | 50,174,938
Stock Options Issued and Outstanding [Member] |  |
Class Of Stock [Line Items] |  |
Common stock reserved | 9,335,202 | 8,152,093
Stock Options Reserved for 2020 Incentive Award Plan [Member] |  |
Class Of Stock [Line Items] |  |
Common stock reserved | 1,743,618 | 478,109
Unvested Restricted Stock Units Outstanding [Member] |  |
Class Of Stock [Line Items] |  |
Common stock reserved | 533,917 | 550,236
Common Stock Reserved for Employee Stock Purchase Plan [Member] |  |
Class Of Stock [Line Items] |  |
Common stock reserved | 1,401,331 | 994,257
2022 Employment Inducement Award Plan [Member] |  |
Class Of Stock [Line Items] |  |
Common stock reserved | 870,400 | 1,610,600
Pre-Funded Warrants [Member] |  |
Class Of Stock [Line Items] |  |
Common stock reserved | 22,113,649 | 24,696,206
Common Warrants [Member] |  |
Class Of Stock [Line Items] |  |
Common stock reserved | 8,427,508 | 8,427,508
2021 ATM Program [Member] |  |
Class Of Stock [Line Items] |  |
Common stock reserved | 2,619,471 | 5,265,929

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