Quarterly report pursuant to Section 13 or 15(d)

Warrant Liabilities (Details Textual)

v2.4.0.6
Warrant Liabilities (Details Textual) (USD $)
6 Months Ended
Jun. 30, 2012
Apr. 09, 2012
Mar. 15, 2011
Sep. 30, 2010
Dec. 31, 2009
Warrant Liability (Textual) [Abstract]          
Purchase and sale of shares of common stock under subscription agreements   6,517,648      
Exercise price of warrant per share     1.57 0.87 2.13
Warrant Liability (Additional Textual) [Abstract]          
Deerfield six-year warrants to Purchase common stock shares 6,000,000        
Exercise price of common stock shares $ 1.57        
Exercisable and expiration date of warrant Mar. 15, 2017        
Series A Warrants [Member]
         
Warrant Liability (Textual) [Abstract]          
Six-year warrants to purchase shares of common stock   6,517,648      
Exercise price of warrant per share   1.15      
Series B Warrants [Member]
         
Warrant Liability (Textual) [Abstract]          
Six month warrants to purchase shares of common stock   6,517,648      
Exercise price of warrant per share   0.85