Unaudited condensed consolidated interim statements of cash flows - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Operating activities
Net loss for the period	$ (136.7)	$ (36.5)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation	3.2	3.2
Depreciation and amortization	4.2	1.9
Foreign exchange (gain) loss on translation	(1.3)	0.2
Fair value loss on financial instruments	23.8	0.7
Bad debt expense	0.0	1.0
Inventory write downs to net realizable value	1.8	2.1
Loss on write off of fixed assets	0.1	0.0
Interest and accretion on convertible debt	11.5	1.1
Debt extinguishment loss (Note 14)	58.9	0.0
Non-cash lease expense	(1.1)	(0.1)
Adjustments to reconcile net income (loss) to cash provided by (used in) operating activities	(35.6)	(26.4)
Changes in working capital items:
Accounts receivable	(1.9)	(0.4)
Other receivables	0.3	4.4
Prepayments and deposits	2.1	(3.3)
Inventories	(0.4)	0.5
Lease Liabilities	2.1	0.0
Accounts payable and accrued liabilities	4.3	2.8
Net cash used in operating activities	(29.1)	(22.4)
Investing activities
Adjustments to purchases of property, plant, equipment, and other assets	(6.2)	(86.3)
Net cash used in investing activities	(6.2)	(86.3)
Financing activities
Proceeds from convertible debt	75.0	0.0
Payments of transaction costs	(1.3)	0.0
Net cash provided by financing activities	73.7	0.0
Net change in cash, cash equivalents and restricted cash	38.4	(108.7)
Cash, cash equivalents and restricted cash, beginning of period	80.3	517.9	$ 517.9
Cash, cash equivalents and restricted cash, end of period	118.7	409.2	$ 80.3
Supplemental non-cash investing activities:
Purchases of property and equipment included in liabilities	16.7	25.4
Decreases of property and equipment and liabilities for credits from suppliers	24.4	0.0
Supplemental information:
Interest paid	$ 0.0	$ (0.1)