Balance Sheet Components - Schedule of Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Payables and Accruals [Abstract]
Accrued employee compensation	$ 19,545	$ 25,749
Accrued research and development costs	3,913	4,605
Accrued asset purchases	2,980	4,101
Accrued professional services	3,086	2,636
Other	3,495	3,779
Total accrued liabilities	$ 33,019	$ 40,870	[1]

[1] The condensed consolidated balance sheet as of December 31, 2021 is derived from the audited consolidated financial statements as of that date.