Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED BALANCE SHEETS (Parentheticals)

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CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)
Mar. 31, 2016
Dec. 31, 2015
Statement Of Financial Position [Abstract]    
Redeemable Convertible Series B Preferred Stock, par value (in dollars per share) $ 0.001 $ 0.001
Redeemable Convertible Series B Preferred Stock, shares authorized 20,000,000 20,000,000
Redeemable Convertible Series B Preferred Stock, shares issued 4,492 4,500
Redeemable Convertible Series B Preferred Stock, shares outstanding 4,492 4,500
Redeemable Convertible Series B Preferred Stock, issuance costs $ 493,770  
Redeemable Convertible Series B Preferred Stock, liquidation preference value $ 4,500,000  
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 236,000,000 236,000,000
Common stock, shares issued 19,913,163 19,903,163
Common stock, shares outstanding 19,913,163 19,903,163