Inventories, Net and Significant Supplier - Inventory Reserve (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Schedule of Reserve for Excess and Obsolete Inventory [Rollforward]
Balance at beginning of period		$ 4,205	$ 3,045
Additions charged to costs and expenses	[1]	632	693
Sell through	[2]	(354)	(211)
(Write-offs)/Foreign exchange effects		(274)	(235)
Balance at end of period		4,209	3,292
Inventory scrapped during production		$ 27	$ 63

[1] The additions charged to costs and expenses do not include inventory directly written-off that was scrapped during production totaling $27 thousand and $63 thousand for the three months ended March 31, 2017 and 2016, respectively. These amounts are production waste and are not included in management's reserve for excess and obsolete inventory.

[2] These amounts represent the reduction in reserves associated with inventory items that were sold during the period.