Summary of Significant Accounting Policies - Estimated useful life (Details)	3 Months Ended
	Mar. 31, 2021
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment	7 years
Computer hardware and software
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment	3 years
Minimum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment	5 years
Minimum | Vehicles
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment	3 years
Minimum | Building
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment	28 years
Minimum | Property held under capital leases
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment	3 years
Maximum | Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment	10 years
Maximum | Vehicles
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment	5 years
Maximum | Building
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment	40 years
Maximum | Property held under capital leases
Property, Plant and Equipment [Line Items]
Estimated useful life of property and equipment	5 years