Property, Plant and Equipment - Summary (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 17,476	$ 16,832
Less: accumulated depreciation	(4,316)	(4,069)
Property, plant and equipment, net	13,160	12,763
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	840	840
Building and land improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 5,621	5,621
Building and land improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	5 years
Building and land improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	40 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 9,866	9,028
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	5 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 1,025	1,025
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	3 years
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	7 years
Vehicles
Property, Plant and Equipment [Line Items]
Estimated Useful Lives (Years)	5 years
Property, plant and equipment, gross	$ 124	$ 318