Balance Sheet Components - Summary of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents	$ 104,749	$ 104,055
Restricted cash included in other assets	300	300
Total cash, cash equivalents and restricted cash shown in the consolidated statement of cash flows	$ 105,049	$ 104,355	$ 147,828	$ 106,346