Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 57,675	$ 54,775
Accumulated depreciation	(33,749)	(32,020)
Total property, plant and equipment, net	23,926	22,755
Depreciation expense	7,779	7,314	$ 5,778
Automobiles
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 23	23
Automobiles | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	5 years
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 3,059	3,830
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	4 years
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	20 years
Computer software and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 34,324	26,816
Computer software and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	2 years
Computer software and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	7 years
Machinery and equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 15,527	18,551
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	3 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	5 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,587	2,808
Furniture and fixtures | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	5 years
Furniture and fixtures | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful life (in years)	20 years
Work in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 2,155	$ 2,747