Inventories (Details) - USD ($) $ in Thousands		9 Months Ended	12 Months Ended
		Sep. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Inventory, Net [Abstract]
Raw materials						$ 14,546	$ 9,219
Work-in-process						98	1,195
Finished goods						7,485	10,762
Inventory, Gross						22,129	21,176
Less: inventory valuation allowance		$ (2,701)	$ (2,701)	$ (7,037)	$ (7,037)	(5,317)	(2,701)
Inventories, net						16,812	18,475
Other Inventory, Materials, Supplies and Merchandise under Consignment, Gross						11,500	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
Consignment Inventory with Contract Manufacturer						8,700	100
Inventory, net			$ 1,476	2,412	3,302
Inventory deposit, net			(29)	126	945
Adverse purchase commitments			1,831	323	327
Inventory Valuation Allowance [Roll Forward]
Inventory valuation allowance, beginning of the year		$ 2,701	2,701	7,037
Inventory scrapped			(151)	(5,768)
Inventory utilized			(856)	(1,005)
Subtotal—usage			1,007	6,773
Inventory, net			1,447	2,539	3,302
Transfer from inventory deposit valuation allowance			0	33
Inventory valuation allowance, end of the year			5,317	2,701	$ 7,037
Deferred cost of sales						$ 14,113	$ 176
Write-Downs of Inventory Valuation [Member]
Inventory Valuation Allowance [Roll Forward]
Inventory, net			2,332	3,417
Transfers to Adverse Purchase Commitments [Member]
Inventory Valuation Allowance [Roll Forward]
Inventory, net	[1]		$ 1,291	$ (1,013)

[1] Transfer from other liabilities is related to obsolete inventory purchased from contract manufacturers during the year which was previously reserved for as an adverse purchase commitment. (Note 9—Other Accrued and Other Long-Term Liabilities and Note 13—Commitments and Contingencies.)Deferred cost of sales are related to deferred revenue on shipments to customers and was $14.1 million and $0.2 million at December 31, 2015 and 2014.