Stockholder's Equity - Schedule of Common Stock Reserved for Future Issuance (Detail) - shares	Dec. 31, 2021	Dec. 31, 2020
Class Of Stock [Line Items]
Common stock reserved	5,662,824	3,909,873
Common stock reserved	13,748,479	6,977,906
Options Issued and Outstanding [Member]
Class Of Stock [Line Items]
Common stock reserved	5,662,824	3,909,873
Reserve for 2020 Incentive Plan [Member]
Class Of Stock [Line Items]
Common stock reserved	2,039,951	2,707,947
Unvested Restricted Stock Units Outstanding [Member]
Class Of Stock [Line Items]
Common stock reserved	50,000
Reserved for Employee Stock Purchase Plan [Member]
Class Of Stock [Line Items]
Common stock reserved	729,775	360,086
2021 ATM Program [Member]
Class Of Stock [Line Items]
Common stock reserved	5,265,929