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New and revised standards and interpretations issued but not yet effective (Narrative) (Details)
12 Months Ended
Oct. 31, 2019
USD ($)
New And Revised Standards And Interpretations Issued But Not Yet Effective [Abstract]  
Non cancellable operating lease commitments $ 132,165
Net right-of-use assets 74,307
Current lease liabilities 36,442
Non-current lease liabilities 37,865
Expected profit (loss) decrease (increase) $ 4,374