Balance Sheet Components - Summary of Prepaid Expenses and Other Current Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Prepaid Expense and Other Assets, Current [Abstract]
Prepaid expenses	$ 6,752	$ 2,938
Contract cost assets – current	2,402	1,256
Deferred offering costs	0	995
Prepaid income taxes	0	196
Others	244	427
Total prepaid expenses and other current assets	$ 9,398	$ 5,812