Balance Sheet Components - Property and Equipment, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 7,057	$ 3,247
Less: accumulated depreciation	(2,243)	(1,773)
Property and equipment, net	4,814	1,474
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	1,635	1,447
Computer equipment and software
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	1,561	1,062
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	252	229
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	2,277	57
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment, gross	$ 1,332	$ 452