Income Taxes, Uncertain Tax Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Uncertain Tax Liabilities, Total [Roll Forward]
Beginning balance	$ 413
Ending balance		$ 413
Foreign Tax Authority [Member]
Uncertain Tax Liabilities, Total [Roll Forward]
Beginning balance		283
Increases	275	170
Decreases	23	40
Ending balance	665
Foreign Tax Authority [Member] | China [Member]
Tax [Roll Forward]
Beginning balance	225	222
Increases	0	3
Decreases	23	0
Ending balance	202	225
Interest and Penalties [Roll Forward]
Beginning balance	152	0
Increases	57	152
Decreases	0	0
Ending balance	209	152
Foreign Tax Authority [Member] | Ukraine [Member]
Tax [Roll Forward]
Beginning balance	21	61
Increases	68	0
Decreases	0	40
Ending balance	89	21
Interest and Penalties [Roll Forward]
Beginning balance	15	0
Increases	13	15
Decreases	0	0
Ending balance	28	15
Foreign Tax Authority [Member] | South Korea [Member]
Tax [Roll Forward]
Beginning balance	0	0
Increases	129	0
Decreases	0	0
Ending balance	129	0
Interest and Penalties [Roll Forward]
Beginning balance	0	0
Increases	8	0
Decreases	0	0
Ending balance	$ 8	$ 0