Sales Tax, Tax Credits and Other Receivables (Tables)
6 Months Ended
Aug. 31, 2019
Receivables [Abstract]  
Sales tax, tax credits and other receivables
   

August 31,

2019

   

February 28,

2019

 
Sales tax   $ 282,178     $ 82,992  
Research and development tax credits     339,532       410,997  
Other receivables     94,604       105,011  
    $ 716,314     $ 599,000