Property and Equipment - Composition of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Total cost of property and equipment	$ 118,795	$ 82,300
Less: accumulated depreciation	(65,534)	(48,859)
Property and equipment, net	53,261	33,441
Computer software, software development costs and equipment
Property, Plant and Equipment [Line Items]
Total cost of property and equipment	70,663	50,242
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Total cost of property and equipment	5,243	5,184
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total cost of property and equipment	4,018	3,587
Manufacturing tools and equipment
Property, Plant and Equipment [Line Items]
Total cost of property and equipment	29,753	15,563
Vehicles
Property, Plant and Equipment [Line Items]
Total cost of property and equipment	0	22
Assets under construction
Property, Plant and Equipment [Line Items]
Total cost of property and equipment	$ 9,118	$ 7,702