Supplemental Consolidated Balance Sheet Information - Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Building under finance lease	$ 21,574	$ 22,608
Property and equipment, gross	45,798	46,762
Less: accumulated depreciation and amortization	(16,433)	(14,462)
Property and equipment, net	29,365	32,300
Finance lease, accumulated amortization	1,800	900
Computers, equipment and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross	7,995	8,029
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, gross	8,284	8,494
Vehicles
Property, Plant and Equipment [Line Items]
Property and equipment, gross	97	97
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	7,755	7,500
Construction in process
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 93	$ 34