Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Total	$ 38,927	$ 45,585
Less accumulated depreciation	(23,973)	(28,286)
Property, plant and equipment, net	14,954	17,299
Construction in progress	2,518	1,590
Property, plant and equipment, net plus construction in progress	17,472	18,889
Land [Member]
Property, Plant and Equipment [Line Items]
Total	$ 300	339
Office buildings [Member]
Property, Plant and Equipment [Line Items]
Expected Life	39 years
Total	$ 4,400	3,709
Production facilities [Member]
Property, Plant and Equipment [Line Items]
Total	$ 10,321	9,345
Production facilities [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Expected Life	10 years
Production facilities [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Expected Life	20 years
Machinery and equipment [Member]
Property, Plant and Equipment [Line Items]
Total	$ 22,412	30,683
Machinery and equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Expected Life	3 years
Machinery and equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Expected Life	15 years
Furniture and fixtures [Member]
Property, Plant and Equipment [Line Items]
Total	$ 1,494	$ 1,509
Furniture and fixtures [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Expected Life	3 years
Furniture and fixtures [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Expected Life	20 years