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Stock Options (Detail Textuals) - $ / shares | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Feb. 29, 2020 | Aug. 31, 2019 | Feb. 29, 2020 | Aug. 31, 2019 | Aug. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Exercise price | $ 0.47 |  | $ 0.54 | $ 1.00 | $ 1.49
Term of expiration |  |  | 5 years |  |
Term of options vesting |  | 3 years |  |  |
Directors Officers Employees And Consultants |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock options available for grant |  | 1,725,000 |  | 1,725,000 |
Exercise price |  |  |  |  | $ 1.53
Officer [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock options available for grant |  |  |  |  | 200,000
Exercise price |  |  |  |  | $ 0.83
Stock options expiration date |  |  |  |  | Dec. 01, 2022
2007 Equity incentive plan | Directors Officers Employees And Consultants |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock options available for grant |  | 7,838,713 |  | 7,838,713 |
2007 Equity incentive plan | Employees And Directors |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock options available for grant | 412,500 | 412,500 | 412,500 | 412,500 |
2019 Equity Incentive Plan | Directors Officers Employees And Consultants |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock options available for grant | 7,838,713 |  | 7,838,713 |  |
2014 Stock Option Plan | Directors Officers Employees And Consultants |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock options available for grant | 1,997,500 | 2,107,500 | 1,997,500 | 2,107,500 |
2010 Stock Option Plan | Officers And Employees |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Stock options available for grant | 1,512,500 | 1,512,500 | 1,512,500 | 1,512,500 |
Stock Options 1 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Exercise price | $ 0.47 |  |  | $ 1.27 |
Stock Options 1 | On grant |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of stock options vested | 20,000 |  |  |  |
Stock Options 2 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Exercise price | $ 0.43 |  |  | $ 1.06 |
Stock Options 2 | Annually thereafter until fully vested |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of stock options vested | 20,000 |  |  |  |

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