Inventory (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Inventory [Abstract]
Raw materials	$ 1,608,000	$ 592,000
Work in process	10,806,000	699,000
Finished goods	1,142,000	132,000
Total inventories	13,556,000	1,423,000
Inventories included in prepaid expenses and other current assets	3,500,000
Inventories included in other assets	10,100,000
Inventory write down	$ 500,000