Inventories (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Other Inventory, Materials, Supplies and Merchandise under Consignment, Gross	$ 700,000	$ 3,800,000
Inventory, net	1,928,000	2,668,000	1,368,000
Inventory Deposit, net	926,000	1,096,000	1,531,000
Adverse Purchase Commitments	31,000	733,000	318,000
Transfer to Inventory Deposit, Valuation Allowance	(305,000)	(273,000)
Inventory, Net [Abstract]
Raw materials	10,420,000	10,925,000
Work-in-process	605,000	599,000
Finished goods	11,245,000	20,127,000
Inventory, Gross	22,270,000	31,651,000
Less: inventory valuation allowance	(2,199,000)	(4,640,000)	(3,547,000)
Inventory Scrapped	(3,397,000)	(1,767,000)
Inventory Utilized	(696,000)	(933,000)
Inventories, net	20,071,000	27,011,000
Inventory Valuation Allowance, Inventory Consumed	(4,093,000)	(2,700,000)
Other Inventory, Net [Abstract]
Inventory deposit (A)	11,637,000	11,578,000
Less: inventory deposit valuation allowance	(2,801,000)	(3,135,000)
Inventory Deposit, Net	8,836,000	8,443,000
Transfers to Adverse Purchase Commitments [Member]
Inventory, net	$ 29,000	$ 1,398,000