Prepayments and deposits - Summary of Prepayments and deposits (Detail) - USD ($)	Jul. 31, 2021	Oct. 31, 2020	Oct. 31, 2019
Disclosure of Detailed Information About Prepayments and Deposits [Abstract]
Prepaid lease deposits	$ 675,773	$ 33,501
Prepaid transaction costs	6,176,806
Other prepaids	1,058,857	930,450
Total	$ 7,911,436	$ 963,951	$ 330,127

The amount recognised as a current asset for expenditures made prior to the period when the economic benefit will be realised.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2020-01-01

Name:	ifrs-full_CurrentPrepaidExpenses
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant