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CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)
Dec. 31, 2014
Dec. 31, 2013
CONSOLIDATED BALANCE SHEETS    
Preferred stock, par value (in dollars per share) $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 5,000,000us-gaap_PreferredStockSharesAuthorized 5,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 335,273us-gaap_PreferredStockSharesIssued 335,273us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding 335,273us-gaap_PreferredStockSharesOutstanding 335,273us-gaap_PreferredStockSharesOutstanding
Preferred stock, liquidation preference value (in dollars) $ 3,989,749us-gaap_PreferredStockLiquidationPreferenceValue $ 3,989,749us-gaap_PreferredStockLiquidationPreferenceValue
Common stock, par value (in dollars per share) $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 100,000,000us-gaap_CommonStockSharesAuthorized 100,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 23,199,469us-gaap_CommonStockSharesIssued 19,369,332us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 23,199,469us-gaap_CommonStockSharesOutstanding 19,369,332us-gaap_CommonStockSharesOutstanding