Loan payable - Schedule of Loans Payable (Details) $ in Millions	12 Months Ended
	Oct. 31, 2021 USD ($)
Movement In Loans Payable [Roll Forward]
Balance as at November 1, 2020	$ 2.3
Proceeds from loan payable	10.1
Repayment of loan payable	(12.5)
Foreign exchange loss	0.1
Balance as at October 31, 2021	0.0
BDC Loan
Movement In Loans Payable [Roll Forward]
Balance as at November 1, 2020	2.2
Proceeds from loan payable	3.1
Repayment of loan payable	(5.5)
Foreign exchange loss	0.2
Balance as at October 31, 2021	0.0
Promissory Notes and Other
Movement In Loans Payable [Roll Forward]
Balance as at November 1, 2020	0.1
Proceeds from loan payable	7.0
Repayment of loan payable	(7.0)
Foreign exchange loss	(0.1)
Balance as at October 31, 2021	$ 0.0