Inventories, Net and Significant Suppliers - Inventory Reserves (Details) (USD $)	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Schedule of Reserve for Excess and Obsolete Inventory
Balance at beginning of period	$ 2,714,000		$ 2,024,000		$ 3,447,000
Additions charged to costs and expenses	3,181,000	[1]	3,387,000	[1]	2,511,000	[1]
Sell through	(869,000)	[2]	(365,000)	[2]	(1,166,000)	[2]
Write-offs/FX effects	(2,487,000)		(2,332,000)		(2,768,000)
Balance at end of period	2,539,000		2,714,000		2,024,000
Inventory scrapped during production	$ 300,000		$ 300,000		$ 500,000

[1] The additions charged to costs and expenses do not include inventory directly written-off that was scrapped during production totaling $0.3 million, $0.3 million, and $0.5 million for the years ended December 31, 2014, 2013, and 2012, respectively. These amounts are production waste and are not included in management’s reserve for excess and obsolete inventory.

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