Intellectual Property Prepaid Royalties and Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Intellectual Property Prepaid Royalties
Amortization for license agreements	$ 1,300	$ 1,600
Future amortization expense, prepaid royalties
2016	1,182
2017	799
2018	799
2019	675
2020	503
Thereafter	3,359
Total	$ 7,317