Property, Plant and Equipment, net - Schedule of components of property, plant and equipment, net, excluding discontinued operations (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 34,181	$ 30,950
Less accumulated depreciation	(19,830)	(18,375)
Property, plant and equipment, Net	14,351	12,575
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	199	199
Building and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	6,983	6,983
Rental property
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	2,749	2,749
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	12,015	2,226
Furniture and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	11,755	10,274
Construction in process
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 480	$ 8,519