Post-effective amendment to a registration statement that is not immediately effective upon filing

Common Shares and Warrants (Details 2)

v3.20.4
Common Shares and Warrants (Details 2) - $ / shares
12 Months Ended
Aug. 31, 2020
Aug. 31, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Expected life 5 years 5 years
Dividend yield 0.00% 0.00%
Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Expected volatility 95.00% 100.00%
Risk-free interest rate 0.35% 1.42%
Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Expected volatility 96.00% 144.00%
Risk-free interest rate 1.66% 2.89%
Warrant    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Dividend yield 0.00% 0.00%
Warrant | Minimum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Expected volatility 91.00% 1.00%
Risk-free interest rate 0.36% 2.31%
Expected life 2 years 1 day
Estimated fair value per warrant $ 0.28
Warrant | Maximum    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Expected volatility 94.00% 117.00%
Risk-free interest rate 2.87% 2.87%
Expected life 5 years 2 years
Estimated fair value per warrant $ 0.54 $ 0.57