Financial Statement Components - Schedule of Property and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 97,182	$ 94,735
Accumulated depreciation	(38,992)	(28,435)
Total property and equipment, net	58,190	66,300
Machinery and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	61,017	58,815
Computer hardware and software
Property, Plant and Equipment [Line Items]
Total property and equipment	7,907	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	2,139	2,207
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total property and equipment	929	900
Construction in progress
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 1,569	$ 2,256