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Disclosure of detailed information about non-cash working capital (Details) - USD ($)
$ in Thousands
3 Months Ended
Nov. 30, 2019
Nov. 30, 2018
Supplementary Cash Flow Information [Abstract]    
Amounts receivable, prepaid expenses and other assets $ 87 $ 651
Accounts payable and other liabilities (218) (378)
Net change in non-cash working capital $ (131) $ 273