Balance Sheet Components - Summary of Accrued and Other Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Payables And Accruals [Abstract]
Accrued employee related costs	$ 6,725	$ 4,359
Accrued research and development costs	2,727	1,715
Accrued professional fees	739	774
Operating lease liabilities	$ 368	$ 207
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent
Other	$ 167	$ 93
Total accrued and other liabilities	$ 10,726	$ 7,148