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 - 9 months ended Sep. 30, 2016 - USD ($)
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Balance at Dec. 31, 2015 $ 29,274,676 $ 161 $ 107,981,695 $ (78,707,180)
Balance (in shares) at Dec. 31, 2015   16,298,208    
Stock-based compensation - stock options 842,569 $ 0 842,569 0
Stock-based compensation - restricted stock units ("RSUs") 3,577,081 0 3,577,081 0
Stock-based compensation - employee stock purchase plan ("ESPP") 220,546 0 220,546 0
Stock-based compensation - performance share units ("PSUs") 673,405 0 673,405 0
Stock-based compensation - deferred stock units ("DSUs") 92,307 0 92,307 0
Issuance of shares for RSUs 0 $ 4 (4) 0
Issuance of shares for RSUs (in shares)   335,836    
Shares repurchased for tax withholdings on vesting of RSUs (266,217) $ 0 (266,217) 0
Shares repurchased for tax withholdings on vesting of RSUs (in shares)   (20,669)    
Issuance of shares for PSUs 0 $ 1 (1) 0
Issuance of shares for PSUs (in shares)   142,322    
Shares repurchased for tax withholdings on vesting of PSUs (46,463) $ 0 (46,463) 0
Shares repurchased for tax withholdings on vesting of PSUs (in shares)   (3,607)    
Exercise of stock options 270,716 $ 1 270,715 0
Exercise of stock options (in shares)   106,441    
Cashless exercise of warrants 0 $ 5 (5) 0
Cashless exercise of warrants (in shares)   474,854    
Shares purchased from contributions to the ESPP 533,005 $ 1 533,004 0
Shares purchased from contributions to the ESPP (In shares)   47,685    
Issuance of shares and warrants in a private placement, net of issuance costs of $109,340 19,890,660 $ 16 19,890,644 0
Issuance of shares and warrants in a private placement, net of issuance costs of $109,340 (in shares)   1,618,123    
Net loss (31,206,160) $ 0 0 (31,206,160)
Balance at Sep. 30, 2016 $ 23,856,125 $ 189 $ 133,769,276 $ (109,913,340)
Balance (in shares) at Sep. 30, 2016   18,999,193