Inventories (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Inventory, Net [Abstract]
Raw materials	$ 12,470		$ 12,470		$ 9,219
Work-in-process	552		552		1,195
Finished goods	7,367		7,367		10,762
Inventory, Gross	20,389		20,389		21,176
Less: inventory valuation allowance	(4,780)		(4,780)		(2,701)
Inventories, net	15,609		15,609		18,475
Other Inventory, Materials, Supplies and Merchandise under Consignment, Gross	8,500		$ 8,500		2,600
Age of consignment inventory purchased by contract manufacturer			365 days
Age of consignment inventory purchased as a result of forecasted demand			180 days
Inventory Charges, Inventory Valuation, Deposit And Adverse Purchase Commitment Liability	806	$ 875	$ 1,078	$ 2,219
Adverse Purchase Commitments	527	$ 378	1,534	$ 532
Inventory for Long-term Contracts or Programs, Gross	$ 6,400		$ 6,400		$ 100