Property and Equipment, net - Components of Property and Equipment, net (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 78,847	$ 73,952
Less accumulated depreciation and amortization	(51,232)	(43,548)
Total property and equipment, net	27,615	30,404
Assets not yet in service
Property, Plant and Equipment [Line Items]
Property and equipment, gross	2,111	301
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	11,906	9,823
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	12,839	12,094
Computer and equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	36,119	34,894
Transportation equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	13,519	14,043
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 2,353	$ 2,797