Property, Plant and Equipment, Net - Components of Property, Plant and Equipment, Net, Excluding Discontinued Operations (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Gross assets	$ 35,856	$ 33,720
Less accumulated depreciation	(22,147)	(19,864)
Property, plant and equipment, net	13,709	13,856
Land
Property, Plant and Equipment [Line Items]
Gross assets	199	199
Building and improvements
Property, Plant and Equipment [Line Items]
Gross assets	7,822	7,805
Rental property
Property, Plant and Equipment [Line Items]
Gross assets	2,749	2,749
Software
Property, Plant and Equipment [Line Items]
Gross assets	12,100	12,099
Furniture and equipment
Property, Plant and Equipment [Line Items]
Gross assets	12,816	10,198
Construction in process
Property, Plant and Equipment [Line Items]
Gross assets	$ 170	$ 670