Foreign Customer Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Revenue, Major Customer [Line Items]
Total Sales	$ 15,261	$ 19,580
Sales Revenue [Member] | Canada, Mexico & South/Central America [Member]
Revenue, Major Customer [Line Items]
Total Sales	3,894	4,627
Sales Revenue [Member] | Pacific Rim [Member]
Revenue, Major Customer [Line Items]
Total Sales	2,906	4,630
Sales Revenue [Member] | Europe Africa And Middle East [Member]
Revenue, Major Customer [Line Items]
Total Sales	$ 8,461	$ 10,323