Balance Sheet Components - Components of Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Balance Sheet Components [Abstract]
Accrued salary and payroll-related expenses	$ 1,637	$ 3,091
Accrued liabilities	852	962
Income taxes payable	365	336
Advanced billings	345	334
Other	1,409	1,453
Total accrued expenses and other current liabilities	$ 4,608	$ 6,176	[1]

[1] Derived from the Company’s audited consolidated financial statements as of December 31, 2021.