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CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)
Dec. 31, 2013
Dec. 31, 2012
CONSOLIDATED BALANCE SHEETS    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred stock, shares issued 335,273 1,213,142
Preferred stock, shares outstanding 335,273 1,213,142
Preferred stock, liquidation preference value (in dollars) $ 3,989,749 $ 14,436,390
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 19,369,332 8,686,484
Common stock, shares outstanding 19,369,332 8,686,484