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Inventory (Details) (USD $)
Jun. 30, 2011
Dec. 31, 2010
Inventory [Abstract]    
Raw materials $ 223,000 $ 592,000
Work in process 6,188,000 699,000
Finished goods 131,000 132,000
Total inventories 6,542,000 1,423,000
Inventories included in prepaid expenses and other current assets 600,000  
Inventories included in other assets $ 5,900,000