Inventories (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2012		Sep. 30, 2011	Sep. 30, 2012		Sep. 30, 2011	Dec. 31, 2011
Inventory, Net [Abstract]
Raw materials	$ 11,171,000			$ 11,171,000			$ 10,925,000
Work-in-process	1,066,000			1,066,000			599,000
Finished goods	10,891,000			10,891,000			20,127,000
Inventory, Gross	23,128,000			23,128,000			31,651,000
Less: inventory valuation allowance	(2,635,000)			(2,635,000)			(4,640,000)
Inventories, net	20,493,000			20,493,000			27,011,000
Other Inventory, Net [Abstract]
Inventory deposit (A)	11,929,000	[1]		11,929,000	[1]		11,578,000	[1]
Less: inventory deposit valuation allowance	(2,455,000)			(2,455,000)			(3,135,000)
Inventory Deposit, Net	9,474,000			9,474,000			8,443,000
Other Inventory, Materials, Supplies and Merchandise under Consignment, Gross	500,000			500,000			3,800,000
Inventory, net	384,000		815,000	1,415,000		1,637,000
Inventory Deposit, net	158,000		394,000	521,000		802,000
Adverse Purchase Commitments	$ (84,000)		$ 28,000	$ (112,000)		$ 825,000

[1] The Company is contractually obligated to reimburse its contract manufacturer for the cost of excess inventory that has been purchased as a result of the Company's forecasted demand when there is no alternative use. The Company's inventory deposit represents a cash deposit paid to its contract manufacturer for inventory in excess of near term demand. The 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 manufacturers or reduced based on the usage of inventory. See Note 10 - Commitments and Contingencies for additional information regarding the Company's adverse purchase commitment liability.