Income taxes (Tables)

12 Months Ended

Dec. 31, 2023

Income Tax Disclosure [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign

Net loss before income tax includes the following components:

	For the year ended December 31, 2023		For the 2-month period ended December 31, 2022		For the year ended October 31, 2022		For the year ended October 31, 2021
Canada	$	(72.0)	$	4.6	$	(46.1)	$	(70.9)
Foreign	(65.9)		(3.0)		(4.2)		0.4
Total	$	(137.9)	$	1.6	$	(50.3)	$	(70.5)

Schedule of Components of Income Tax Expense (Benefit)

The expense for income taxes consists of:

	For the year ended December 31, 2023		For the 2-month period ended December 31, 2022		For the year ended October 31, 2022		For the year ended October 31, 2021
Current
Canada	$	—	$	—	$	—	$	—
Foreign	0.1		—		—		—
	$	0.1	$	—	$	—	$	—
Deferred and other
Canada	$	—	$	—	$	—	$	—
Foreign	—		—		—		—
	$	—	$	—	$	—	$	—
Income tax expense	$	0.1	$	—	$	—	$	—

Schedule of Effective Income Tax Rate Reconciliation

The recovery of income taxes differs from the amount obtained by applying the statutory Federal and Provincial/State income tax rates to the loss for the period as follows:

	For the year ended December 31, 2023			For the 2-month period ended December 31, 2022			For the year ended October 31, 2022			For the year ended October 31, 2021
Net loss for the year before tax	$	(137.9)		$	1.6		$	(50.3)		$	(70.5)
Statutory tax rates	26.5		%	26.5		%	26.5		%	26.5		%
	$	(36.5)		$	0.4		$	(13.3)		$	(18.7)
Change in valuation allowance	$	26.1		$	(1.2)		$	17.6		$	8.8
Rate differential	3.0			0.3			0.5			—
Internal transfer of intangible property	4.0			—			—			—
Other	0.1			—			0.1			—
Non-deductible item and others	3.4			0.5			(4.9)			9.9
Income tax expense	$	0.1		$	—		$	—		$	—

Schedule of Deferred Tax Assets and Liabilities

The components of deferred tax assets and liabilities are as follows:

	For the year ended December 31, 2023		For the 2-month period ended December 31, 2022		For the year ended October 31, 2022		For the year ended October 31, 2021
Deferred tax assets
Tax losses and credits carryforwards	$	82.6	$	50.8	$	48.6	$	14.3
Share issuance costs	6.6		9.4		10.1		12.6
Convertible debt	—		—		—		—
Reserves and provisions	0.1		0.1		0.1		0.2
Other	2.8		4.0		3.4		0.1
Right of use assets, net of lease liabilities	0.9		0.5		0.5		0.5
Deferred income tax assets	$	93.0	$	64.8	$	62.7	$	27.7
Less valuation allowance	(68.9)		(42.7)		(43.9)		(25.0)
Deferred tax assets, net of valuation allowance	$	24.1	$	22.1	$	18.8	$	2.7
Deferred tax liabilities
Property, plant and equipment, due to differences in amortization	(8.0)		(9.2)		(11.2)		(2.7)
Convertible debt, due to differences in amortization	(16.1)		(12.9)		(7.6)		—
Deferred tax liabilities, net of valuation allowance	$	(24.1)	$	(22.1)	$	(18.8)	$	(2.7)
Net deferred income tax assets (liabilities)	$	—	$	—	$	—	$	—