Property and Equipment - Components of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Components of Property, Plant and Equipment
Property and equipment	$ 20,541	$ 77,334
Less accumulated depreciation	(11,454)	(37,505)
Property and equipment, net	9,087	39,829
Land
Components of Property, Plant and Equipment
Property and equipment	2,415	2,415
Land improvements
Components of Property, Plant and Equipment
Property and equipment	867	2,025
Buildings and leasehold improvements
Components of Property, Plant and Equipment
Property and equipment	6,364	38,741
Machinery and equipment
Components of Property, Plant and Equipment
Property and equipment	7,760	27,694
Furniture and fixtures
Components of Property, Plant and Equipment
Property and equipment	649	1,671
Transportation equipment
Components of Property, Plant and Equipment
Property and equipment	1,190	1,440
Computer equipment and software
Components of Property, Plant and Equipment
Property and equipment	$ 1,296	$ 3,348