Quarterly report pursuant to Section 13 or 15(d)

8. Share-Based Compensation (Tables)

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8. Share-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Share-based compensation expense
    Three Months Ended
September 30,		     Nine Months Ended
September 30,		  
    2017     2016     2017     2016  
Research and development expenses   $ 29,598     $ 113,976     $ 151,377     $ 1,348,216  
Administrative expenses     272,393       502,957       1,340,478       1,286,980  
    $ 301,991     $ 616,933     $ 1,491,855     $ 2,635,196