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Inventories, Net and Significant Supplier - Inventory Reserve (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Schedule of Reserve for Excess and Obsolete Inventory [Rollforward]    
Balance at beginning of period $ 3,045 $ 2,539
Additions charged to costs and expenses [1] 1,486 1,527
Sell through [2] (537) (526)
Write-off/foreign exchange effects (445) (642)
Balance at end of period 3,549 2,898
Inventory scrapped during production $ 200 $ 100
[1] The additions charged to costs and expenses do not include inventory directly written-off that was scrapped during production totaling $0.2 million and $0.1 million for the six months ended June 30, 2016 and 2015, 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.