Property and Equipment (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment, gross	$ 131,824,000		$ 131,824,000		$ 125,852,000
Less accumulated depreciation	(37,783,000)		(37,783,000)		(30,319,000)
Total property and equipment, net	94,041,000		94,041,000		95,533,000
Depreciation and amortization expense	2,528,000	$ 2,234,000	7,464,000	$ 6,103,000
Machinery and equipment
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment, gross	59,975,000		59,975,000		55,528,000
Leasehold improvements
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment, gross	17,955,000		17,955,000		17,832,000
Vehicles
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment, gross	4,471,000		4,471,000		3,447,000
Furniture and fixtures
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment, gross	903,000		903,000		851,000
Building
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment, gross	35,237,000		35,237,000		34,134,000
Land
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment, gross	11,907,000		11,907,000		11,907,000
Property held under capital leases
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment, gross	828,000		828,000		1,607,000
Computer hardware and software
Property, Plant and Equipment, Net, by Type [Abstract]
Property and equipment, gross	$ 548,000		$ 548,000		$ 546,000