Quarterly report pursuant to Section 13 or 15(d)

CONDENSED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY

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CONDENSED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - 6 months ended Jun. 30, 2017 - USD ($)
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Balance at Dec. 31, 2016 $ 28,551,223 $ 202 $ 153,075,595 $ (124,524,574)
Balance (in shares) at Dec. 31, 2016   20,367,929    
Stock-based compensation - stock options 491,982 $ 0 491,982 0
Stock-based compensation - restricted stock units ("RSUs") 6,022,165 0 6,022,165 0
Stock-based compensation - employee stock purchase plan ("ESPP") 187,352 0 187,352 0
Stock-based compensation - performance share units ("PSUs") 1,201,293 0 1,201,293 0
Stock based compensation - deferred stock units ("DSUs") 1,362 0 1,362 0
Issuance of shares for RSUs 0 $ 3 (3) 0
Issuance of shares for RSUs (in shares)   281,703    
Issuances of shares for DSUs 0 $ 0 0 0
Issuances of shares for DSUs (in shares)   14,953    
Exercise of stock options 727,653 $ 2 727,651 0
Exercise of stock options (in shares)   155,478    
Cashless exercise of warrants 0 $ 0 0 0
Cashless exercise of warrants (in shares)   8,469    
Shares purchased from contributions to the ESPP $ 471,466 $ 0 471,466 0
Shares purchased from contributions to the ESPP (In shares) 33,620 33,620    
Net loss $ (25,392,150) $ 0 0 (25,392,150)
Balance at Jun. 30, 2017 $ 12,262,346 $ 207 $ 162,178,863 $ (149,916,724)
Balance (in shares) at Jun. 30, 2017   20,862,152