Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2016	Jun. 30, 2012	Dec. 31, 2012	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Concentration of Credit Risk and Single Source Suppliers
Marketable securities	$ 25,712			$ 25,712	$ 22,619
Advertising Costs
Advertising expense				2,761	2,712	$ 2,825
Foreign Currency Translation
Foreign currency transaction gain (loss), before tax				53	$ 59	126
Gain on Settlement of Royalty Payments	$ 855
Net sales to SANG
Accounting Policies [Line Items]
Contract amount		$ 35,600
Contracts revenue						$ 1,300
Net sales to SANG | Defense Products
Accounting Policies [Line Items]
Contract amount			$ 21,200
Net sales to SANG | Sevices
Accounting Policies [Line Items]
Contract amount			$ 14,400
Accounting Standards Update 2016-09 [Member]
Accounting Policies [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification				$ 1,571