Quarterly report pursuant to Section 13 or 15(d)

8. Share-Based Compensation (Tables)

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8. Share-Based Compensation (Tables)
6 Months Ended
Jun. 30, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Share-based compensation expense
    Three Months Ended June 30,     Six Months Ended June 30,  
    2016     2015     2016     2015  
Research and development expenses   $ 1,427,691     $ 51,736     $ 1,234,240     $ 150,881  
Administrative expenses     304,112       38,234       784,023       86,317  
    $ 1,731,803     $ 89,970     $ 2,018,263     $ 237,198