Balance Sheet Components - Summary of Accrued Expense and Other Current Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accrued Liabilities Current [Abstract]
Accrued research and development materials and services	$ 1,674	$ 519
Accrued professional services	170	67
Accrued personnel expenses	419	47
Other	480
Total accrued expenses and other current liabilities	$ 2,743	$ 633