Inventories (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Inventory, Net [Abstract]
Raw materials	$ 21,127,000		$ 10,420,000
Work-in-process	1,194,000		605,000
Finished goods	9,644,000		11,245,000
Inventory, Gross	31,965,000		22,270,000
Less: inventory valuation allowance	(7,037,000)		(2,199,000)		(4,640,000)
Inventories, net	24,928,000		20,071,000
Other Inventory, Net [Abstract]
Inventory deposit (A)	1,289,000	[1]	11,637,000	[1]
Less: inventory deposit valuation allowance	(808,000)		(2,801,000)
Inventory deposit, net	481,000		8,836,000
Inventory Deposit under Consignment	10,300,000
Other Inventory, Materials, Supplies and Merchandise under Consignment, Gross	12,000,000		700,000
Inventory, net	3,302,000		1,080,000		2,668,000
Inventory deposit, net	945,000		926,000		1,096,000
Adverse purchase commitments	327,000		31,000		733,000
Inventory Valuation Allowance [Roll Forward]
Inventory valuation allowance, beginning of the year	2,199,000		4,640,000
Inventory scrapped	(956,000)		(3,397,000)
Inventory utilized	(363,000)		(696,000)
Subtotal—usage	(1,319,000)		(4,093,000)
Inventory, net	3,302,000		1,232,000		2,668,000
Transfer from (to) inventory deposit valuation allowance	2,457,000		(305,000)
Inventory valuation allowance, end of the year	7,037,000		2,199,000		4,640,000
Write-Downs of Inventory Valuation [Member]
Inventory Valuation Allowance [Roll Forward]
Inventory, net	3,665,000		1,928,000
Transfers to Adverse Purchase Commitments [Member]
Inventory Valuation Allowance [Roll Forward]
Inventory, net	$ 35,000	[2]	$ 29,000	[2]

[1] (A)Beginning in the third quarter of 2013 the Company modified the inventory deposit arrangement with its contract manufacturing partner. Prior to the modification, the Company was obligated to place a deposit with its contract manufacturer for the cost of excess inventory that had been purchased as a result of the Company's forecasted demand when there was no alternative use. Under the new arrangement, rather than place a deposit with the contract manufacturer, the Company is now obligated to purchase the inventory on consignment. The calculation of excess inventory and its impact on the Company’s cash and reported aggregate inventory levels is the same under the consignment arrangement as it was under the prior deposit arrangement. As of December 31, 2013, the balance of consigned inventory at the Company’s contract manufacturing partner was $10.3 million with the remaining inventory deposit associated with inventory held at the Company’s outsourced hardware repair service provider. The remaining deposit is recorded net of adverse purchase commitment liabilities, and therefore the net balance of the deposit represents inventory the Company believes will be utilized. The deposit will be applied against future adverse purchase commitments owed to the Company's contract manufacturer or reduced based on the usage of inventory. See Note 14 - Commitments and Contingencies for additional information regarding the Company's adverse purchase commitment liability.

[2] 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 10—Other Accrued and Other Long-Term Liabilities and Note 14—Commitments and Contingencies.)