Inventories (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Inventory Disclosure [Abstract]
Inventory Charges, net (E&O and APC)	$ 2,237	$ 312	$ 2,503	$ 272
Deferred Costs of Sales, Current	0		0		$ 14,100
Inventory, Net [Abstract]
Raw materials	20,496		20,496		14,546
Work-in-process	39		39		98
Finished goods	9,315		9,315		7,485
Inventory, Gross	29,850		29,850		22,129
Less: inventory valuation allowance	(6,549)		(6,549)		(5,317)
Inventories, net	23,301		23,301		16,812
Other Inventory, Materials, Supplies and Merchandise under Consignment, Gross	12,800		$ 12,800		11,500
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	844	743	$ 1,389	1,279
Adverse Purchase Commitments	(1,393)	$ 431	(1,114)	$ 1,007
Inventory for Long-term Contracts or Programs, Gross	$ 10,600		$ 10,600		$ 8,700