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Statements of Stockholders' Equity - USD ($)
Series A-1 Convertible Preferred Stock
Common Stock
Additional Paid-In Capital
Accumulated Deficit
Total
Balance at Dec. 31, 2013 $ 30,726 $ 1,428 $ 66,150,674 $ (63,275,409) $ 2,907,419
Balance, shares at Dec. 31, 2013 30,726,326 1,426,593      
Issuance of common stock, net of issuance costs   $ 8,050 57,240,169   57,248,219
Issuance of common stock, net of issuance costs, shares   8,050,000      
Exercise of options   $ 157 134,134   134,291
Exercise of options, shares   157,886      
Conversion of preferred stock to common stock $ (30,726) $ 9,305 21,421    
Conversion of preferred stock to common stock, shares (30,726,326) 9,305,359      
Stock-based compensation     1,635,065   1,635,065
Net loss       (11,121,566) (11,121,566)
Balance at Dec. 31, 2014   $ 18,940 125,181,463 (74,396,975) 50,803,428
Balance, shares at Dec. 31, 2014   18,939,838      
Exercise of options   $ 109 114,012   114,121
Exercise of options, shares   110,366      
Stock-based compensation     2,323,603   2,323,603
Net loss       (12,769,498) (12,769,498)
Balance at Dec. 31, 2015   $ 19,049 127,619,078 (87,166,473) 40,471,654
Balance, shares at Dec. 31, 2015   19,050,204      
Issuance of common stock, net of issuance costs   $ 4,146 23,597,809   23,601,955
Issuance of common stock, net of issuance costs, shares   4,145,584      
Exercise of options and warrants   $ 54 72,539   72,593
Exercise of options and warrants, shares   54,235      
Stock-based compensation     2,964,767   2,964,767
Net loss       (31,809,838) (31,809,838)
Balance at Dec. 31, 2016   $ 23,249 $ 154,254,193 $ (118,976,311) $ 35,301,131
Balance, shares at Dec. 31, 2016   23,250,023