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Stock Options (Tables) | 6 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 29, 2020 | Aug. 31, 2019
Share-based Payment Arrangement [Abstract] |  |
Schedule of exercise price |
Quantity |  |  | Exercise Price $ |  |  | Life (Years) |
550,000 |  |  |  | 0.47 |  |  |  | 5 |
60,000(1) |  |  |  | 0.43 |  |  |  | 5 |
610,000 |  |  |  | 0.47 |  |  |  |  |
(1) Options granted vest 20,000 on grant and 20,000 annually thereafter until fully vested. |
Quantity |  |  | Exercise Price $ |  |  |  | Life (Years) |
| 390,000(1) |  |  |  | 1.27 |  |  |  | 5 |
| 240,000(1) |  |  |  | 1.06 |  |  |  | 5 |
| 30,000(1) |  |  |  | 1.16 |  |  |  | 5 |
| 350,000 |  |  |  | 0.99 |  |  |  | 5 |
| 440,000(1) |  |  |  | 0.99 |  |  |  | 5 |
| 48,000(1) |  |  |  | 0.96 |  |  |  | 5 |
| 100,000 |  |  |  | 0.81 |  |  |  | 5 |
| 450,000(1) |  |  |  | 0.81 |  |  |  | 5 |
| 2,048,000 |  |  |  | 1.00 |  |  |  |  |
(1) Options granted vest over a period of three years |
Schedule of stock options |
|  | Options |  |  | Weighted Average Exercise Price $ |  |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value $
Balance August 31, 2018 |  |  | 4,800,000 |  |  |  | 0.71 |  |  |  |  |
Cancelled/expired |  |  | (1,415,000 | ) |  |  | 0.66 |  |
Exercised |  |  | (430,000 | ) |  |  | 0.15 |  |  |  |  |
Granted |  |  | 2,048,000 |  |  |  | 1.00 |  |  |  |  |
Balance August 31, 2019 |  |  | 5,003,000 |  |  |  | 0.89 |  |  |  |  |
Cancelled/expired |  |  | (550,000 | ) |  |  | 0.09 |  |  |  |  |
Exercised |  |  | (110,000 | ) |  |  | 0.10 |  |  |  |  |
Granted |  |  | 1,610,000 |  |  |  | 0.54 |  |  |  |  |
Balance February 29, 2020 (Outstanding) |  |  | 5,953,000 |  |  |  | 0.88 |  |  | 3.69 |  |  | 94,510
Balance February 29, 2020 (Exercisable) |  |  | 4,397,341 |  |  |  | 0.94 |  |  | 3.46 |  |  | 90,910
|  | Options |  |  | Weighted Average Exercise Price $ |  |  | Weighted Average Remaining Contractual Term (Years) |  |  | Aggregate Intrinsic Value $ |
Balance August 31, 2017 |  |  | 3,320,875 |  |  |  | 0.15 |  |  |  |  |  |  |
Exercised |  |  | (545,875 | ) |  |  | 0.17 |  |  |  |  |  |  |
Granted |  |  | 2,025,000 |  |  |  | 1.49 |  |  |  |  |  |  |
Balance August 31, 2018 |  |  | 4,800,000 |  |  |  | 0.71 |  |  |  |  |  |  |
Expired/Cancelled |  |  | (1,415,000 | ) |  |  | 0.66 |  |  |  |  |  |  |
Exercised |  |  | (430,000 | ) |  |  | 0.15 |  |  |  |  |  |  |
Granted |  |  | 2,048,000 |  |  |  | 1.00 |  |  |  |  |  |  |
Balance August 31, 2019 (Outstanding) |  |  | 5,003,000 |  |  |  | 0.89 |  |  |  | 3.34 |  |  |  | 791,800 |
Balance August 31, 2019 (Exercisable) |  |  | 3,961,000 |  |  |  | 0.90 |  |  |  | 3.03 |  |  |  | 752,300 |
Schedule of fair value of options granted |
|  | February 29 2020 |
Expected volatility |  |  | 95%-96% |
Risk-free interest rate |  |  | 1.45%—1.68% |
Expected life |  |  | 5 years |
Dividend yield |  |  | 0.00% |
Estimated fair value per option |  |  | $0.30 - $0.39 |
|  | August 31 2019 |  |  | August 31 2018 |
Expected volatility |  | 100% – 144% |  |  | 127% – 131% |
Risk-free interest rate |  | 1.42% – 2.89% |  |  | 2.13% – 2.74% |
Expected life |  | 5 years |  |  | 5 years |
Dividend yield |  | 0.00% |  |  | 0.00% |
Estimated fair value per option |  | $0.60 - $1.07 |  |  | $0.70 – $1.73 |

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