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Secondary Offering (Details) (USD $)
In Thousands, unless otherwise specified
1 Months Ended 12 Months Ended
Sep. 30, 2009
Dec. 31, 2009
Secondary Offering (Textual) [Abstract]    
Stock issued in offering, net   14,880
Common Stock [Member]
   
Secondary Offering (Textual) [Abstract]    
Shares sold by university and stockholder 6,900  
Shares sold by university 1,000 1,000
Shares sold by stockholder 5,900  
Stock issued in offering, net $ 14,880