Receivables (Narrative) (Details) - Credit Concentration Risk [Member] - Trade Receivables [Member] |
9 Months Ended | 12 Months Ended |
|---|---|---|
May 31, 2021 |
Aug. 31, 2020 |
|
| Concentration risk, customer | No | No |
| Minimum [Member] | ||
| Concentration risk, percentage | 10.00% | 10.00% |