Financial Statement Components - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 40,412	$ 17,787
Accumulated depreciation and amortization	(10,152)	(6,778)
Total property and equipment, net	30,260	11,009
Depreciation and amortization	4,300	3,900	$ 2,500
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	14,047	7,694
Computer hardware and software
Property, Plant and Equipment [Line Items]
Total property and equipment	6,797	2,854
Land
Property, Plant and Equipment [Line Items]
Total property and equipment	1,001	0
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	885	869
Vehicles, including demonstration fleet
Property, Plant and Equipment [Line Items]
Total property and equipment	3,222	2,421
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	818	272
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 13,642	$ 3,677