Inventory (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Dec. 31, 2011
Inventory [Abstract]
Raw materials	$ 6,975,000	$ 6,975,000	$ 4,666,000
Work in process	13,609,000	13,609,000	10,806,000
Finished goods	3,841,000	3,841,000	1,142,000
Total inventories	24,425,000	24,425,000	16,614,000
Inventories included in prepaid expenses and other current assets	10,500,000	10,500,000	3,700,000
Inventories included in other assets	13,900,000	13,900,000	12,900,000
Inventory write down and reserves	$ 6,500,000	$ 8,400,000