Inventories (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Inventory, Net [Abstract]
Raw materials	$ 12,833,000		$ 12,833,000		$ 22,416,000
Work-in-process	609,000		609,000		1,194,000
Finished goods	10,330,000		10,330,000		9,644,000
Inventory, Gross	23,772,000		23,772,000		33,254,000
Less: inventory valuation allowance	(6,726,000)		(6,726,000)		(7,845,000)
Inventories, net	17,046,000		17,046,000		25,409,000
Other Inventory, Materials, Supplies and Merchandise under Consignment, Gross, Contract Manufacturing Partner	4,300,000		4,300,000		10,300,000
Other Inventory, Materials, Supplies and Merchandise under Consignment, Gross	5,700,000		5,700,000		12,000,000
Inventory Charges, Inventory Valuation, Deposit And Adverse Purchase Commitment Liability	875,000	280,000	2,219,000	1,454,000
Adverse Purchase Commitments	$ 378,000	$ 271,000	$ 532,000	$ 403,000