Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Changes in Stockholders' Equity (Deficit) (Parentheticals)

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Consolidated Statements of Changes in Stockholders' Equity (Deficit) (Parentheticals) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Common Stock [Member]    
IPO, net offering costs $ 1,351,403 $ 2,761,325