Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical)

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CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Parenthetical) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Statement of Stockholders' Equity [Abstract]    
Common stock offering costs $ 3,495,326 $ 655,106
Underwriter's discount   $ 15,771