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, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Share-based compensation expense
    Three Months Ended
September 30,
    Nine Months Ended
September 30,
 
    2018     2017     2018     2017  
Research and development expenses   $ 9,155     $ 29,598     $ 178,926     $ 151,377  
General & administrative expenses     314,323       272,393       996,355       1,340,478  
    $ 323,478     $ 301,991     $ 1,175,281     $ 1,491,855