Assets Held for Sale and Sale of Former Hungarian Subsidiary - Narrative (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Entity Location [Line Items]
Proceeds from sale of Hungarian subsidiary	$ 1,500	$ 0	$ 0	$ 1,500
Change in fair value of assets held for sale	800	0	0	698
Gain (loss) on disposition of property plant equipment	800	$ 42	$ (32)	(24)
VAT Liability	$ 400
Change in fair value of assets held for sale				700
Net loss on disposal and exchange of assets (less than $.1 million in 2014)				300
Net loss on disposal and exchange of assets held for sale (Less than $0.1 million in 2014)				$ 100
Hungary
Entity Location [Line Items]
Percentage of ownership before transaction	100.00%