Property, Plant and Equipment Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 71,137	$ 85,226
Accumulated depreciation and amortization,	(54,591)	(61,678)
Property, plant and equipment, less accumulated depreciation and amortization	16,546	23,548
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	2,625	2,565
Buildings and improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	15,356	16,858
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	24,509	23,955
Capitalized software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	22,136	21,738
McCook facility
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	0	12,961
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	5,673	5,884
Capital leases
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	0	684
Vehicles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	155	190
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 683	$ 391