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Disclosure of detailed information about non-cash working capital (Details) - USD ($)
$ in Thousands
9 Months Ended
May 31, 2019
May 31, 2018
Statements [Line Items]    
Amounts receivable, prepaid expenses and other assets $ 500 $ (275)
Accounts payable and accrued liabilities 247 392
Net change in non-cash working capital $ 747 $ 117