Annual report pursuant to Section 13 and 15(d)

Statement of Changes in Stockholder's Equity

v3.8.0.1
Statement of Changes in Stockholder's Equity - USD ($)
Total
Common Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Beginning balance at Dec. 31, 2014 $ 31,320,563 $ 127 $ 82,465,914 $ (51,145,478)
Beginning balance (in shares) at Dec. 31, 2014   12,781,502    
Issuance of shares for services 147,900   147,900  
Issuance of shares for services (in shares)   15,000    
Stock-based compensation - stock options 1,037,399   1,037,399  
Stock-based compensation - IR warrants 85,831   85,831  
Stock-based compensation - restricted stock units ("RSUs") 4,225,728   4,225,728  
Stock-based compensation - employee stock purchase plan ("ESPP") 113,217   113,217  
Stock-based compensation - performance share units ("PSUs") 489,239   489,239  
Issuance of shares for RSUs   $ 3 (3)  
Issuance of shares for RSUs (in shares)   304,340    
Issuance of shares for PSUs (in shares)   1,072    
Exercise of stock options 65,647   65,647  
Exercise of stock options (in shares)   21,786    
Disgorgement on account of short swing profit 12,611   12,611  
Cashless exercise of warrants   $ 1 (1)  
Cashless exercise of warrants (in shares)   128,480    
Shares purchased from contributions to the ESPP 289,787   289,787  
Shares purchased from contributions to the ESPP (in shares)   46,023    
Secondary offering net of underwriter's discount and offering costs 19,048,456 $ 30 19,048,426  
Secondary offering net of underwriter's discount and offering costs (in shares)   3,000,005    
Net loss (27,561,702)     (27,561,702)
Ending balance at Dec. 31, 2015 29,274,676 $ 161 107,981,695 (78,707,180)
Ending balance (in shares) at Dec. 31, 2015   16,298,208    
Stock-based compensation - stock options 1,045,081   1,045,081  
Stock-based compensation - restricted stock units ("RSUs") 5,735,032   5,735,032  
Stock based compensation - deferred stock units ("DSUs") 123,644   123,644  
Stock-based compensation - employee stock purchase plan ("ESPP") 318,735   318,735  
Stock-based compensation - performance share units ("PSUs") 2,285,683   2,285,683  
Issuance of shares for RSUs   $ 5 (5)  
Issuance of shares for RSUs (in shares)   519,200    
Shares repurchased for tax withholdings on vesting of RSUs (266,217)   (266,217)  
Shares repurchased for tax withholdings on vesting of RSUs (in shares)   (20,669)    
Issuance of shares for PSUs   $ 2 (2)  
Issuance of shares for PSUs (in shares)   209,673    
Shares repurchased for tax withholdings on vesting of PSUs (46,463)   (46,463)  
Shares repurchased for tax withholdings on vesting of PSUs (in shares)   (3,607)    
Exercise of stock options 382,351 $ 1 382,350  
Exercise of stock options (in shares)   130,354    
Cashless exercise of warrants   $ 5 (5)  
Cashless exercise of warrants (in shares)   475,683    
Shares purchased from contributions to the ESPP 727,784 $ 1 727,783  
Shares purchased from contributions to the ESPP (in shares)   85,356    
Issuance of shares and warrants in private placements, net of issuance costs 34,788,311 $ 27 34,788,284  
Issuance of shares and warrants in private placements, net of issuance costs (in shares)   2,673,731    
Net loss (45,817,394)     (45,817,394)
Ending balance at Dec. 31, 2016 28,551,223 $ 202 153,075,595 (124,524,574)
Ending balance (in shares) at Dec. 31, 2016   20,367,929    
Stock-based compensation - stock options 764,723   764,723  
Stock-based compensation - restricted stock units ("RSUs") 13,043,171   13,043,171  
Stock based compensation - deferred stock units ("DSUs") 1,362   1,362  
Stock-based compensation - employee stock purchase plan ("ESPP") 331,913   331,913  
Stock-based compensation - performance share units ("PSUs") 1,661,650   1,661,650  
Issuance of shares for RSUs   $ 8 (8)  
Issuance of shares for RSUs (in shares)   781,051    
Issuance of shares for DSUs 0 $ 0 0 0
Issuance of shares for DSUs (in shares)   14,953    
Issuance of shares for PSUs   $ 1 (1)  
Issuance of shares for PSUs (in shares)   90,000    
Exercise of stock options 979,950 $ 3 979,947  
Exercise of stock options (in shares)   272,205    
Cashless exercise of warrants (in shares)   19,611    
Shares purchased from contributions to the ESPP 869,066 $ 1 869,065  
Shares purchased from contributions to the ESPP (in shares)   62,700    
Issuance of shares and warrants in private placements, net of issuance costs 14,932,547 $ 10 14,932,537  
Issuance of shares and warrants in private placements, net of issuance costs (in shares)   976,139    
Net loss (49,376,875)     (49,376,875)
Ending balance at Dec. 31, 2017 $ 11,758,730 $ 225 $ 185,659,954 $ (173,901,449)
Ending balance (in shares) at Dec. 31, 2017   22,584,588