Financial Statement Components - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 95,945	$ 94,735
Accumulated depreciation and amortization	(33,818)	(28,435)
Total property and equipment, net	62,127	66,300
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	60,159	58,815
Computer hardware and software
Property, Plant and Equipment [Line Items]
Total property and equipment	7,768	7,025
Land
Property, Plant and Equipment [Line Items]
Total property and equipment	1,001	1,001
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	22,620	22,531
Vehicles, including demonstration fleet
Property, Plant and Equipment [Line Items]
Total property and equipment	2,026	2,207
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	928	900
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 1,443	$ 2,256