Annual report pursuant to Section 13 and 15(d)

Stock Options (Details 2)

v3.20.2
Stock Options (Details 2) - $ / shares
12 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected life 5 years 5 years
Dividend yield 0.00% 0.00%
Minimum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected volatility 95.00% 100.00%
Risk-free interest rate 0.35% 1.42%
Estimated fair value per option $ 0.31 $ 0.60
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Expected volatility 96.00% 144.00%
Risk-free interest rate 1.66% 2.89%
Estimated fair value per option $ 0.54 $ 1.07