Summary of significant accounting policies - Weighted average dilutive common shares (Details) - shares |
6 Months Ended | |
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Feb. 28, 2021 |
Feb. 29, 2020 |
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| Total potentially dilutive stock | 6,218,382 | 473,918 |
| Options [Member] | ||
| Total potentially dilutive stock | 1,822,173 | 43,406 |
| Senior Secured Convertible Notes [Member] | ||
| Total potentially dilutive stock | 298,954 | |
| Warrant [Member] | ||
| Total potentially dilutive stock | 4,396,209 | 131,558 |
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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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