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Stockholder's Equity - Schedule of Common Stock Reserved for Future Issuance (Detail) - shares	Sep. 30, 2024	Dec. 31, 2023
Class Of Stock [Line Items]
Common stock reserved	12,757,684	9,208,970
Common stock reserved	2,059,871
Common stock reserved	94,410,198	65,329,843
Employee Stock Option [Member]
Class Of Stock [Line Items]
Common stock reserved	12,757,684	9,208,970
Stock Options Reserved for 2020 Incentive Award Plan [Member]
Class Of Stock [Line Items]
Common stock reserved	2,059,871	1,988,340
Unvested Restricted Stock Units Outstanding [Member]
Class Of Stock [Line Items]
Common stock reserved	782,709	495,579
Common Stock Reserved for Employee Stock Purchase Plan [Member]
Class Of Stock [Line Items]
Common stock reserved	2,023,537	1,338,381
2022 Employment Inducement Award Plan [Member]
Class Of Stock [Line Items]
Common stock reserved	2,398,730	758,084
Pre-Funded Warrants [Member]
Class Of Stock [Line Items]
Common stock reserved	41,283,052	40,493,510
Common Warrants [Member]
Class Of Stock [Line Items]
Common stock reserved	8,104,615	8,427,508
2021 ATM Program [Member]
Class Of Stock [Line Items]
Common stock reserved		2,619,471
2024 ATM Program [Member]
Class Of Stock [Line Items]
Common stock reserved	25,000,000

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