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Prepayments and deposits
 3 Months Ended
Jan. 31, 2022
Prepayments And Deposits [Abstract]  
Prepayments and deposits Prepayments and deposits
January 31, 2022October 31, 2021
$$
Prepaid lease deposits1,315,426886,951
Prepaid equipment deposits13,001,6813,231,836
Prepaid insurance2,337,9203,839,880
Other prepaids2,917,107688,331
19,572,1338,646,998
Other prepaids consist principally of parts and consumables, deposits, subscriptions, and environmental financial assurance.