Consolidated statements of operations and comprehensive income (loss) - USD ($) $ in Millions	2 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2023	Oct. 31, 2022	Oct. 31, 2021
Revenue
Revenue	$ 5.9	$ 18.3	$ 13.4	$ 7.3
Cost of sales
Cost of sales	(10.8)	(81.8)	(48.4)	(13.3)
Selling, general and administrative expense	(14.7)	(93.4)	(74.9)	(22.7)
Research and development	(0.7)	(5.7)	(2.4)	(3.4)
Loss from operations	(20.3)	(162.6)	(112.3)	(32.1)
Other income (expense)
Interest income	3.5	12.7	7.0	0.1
Interest expense	(2.2)	(7.6)	(12.5)	(2.6)
Foreign exchange loss	(0.8)	(2.5)	0.0	(0.7)
Fair value gain (loss) on financial instruments	21.4	22.1	67.5	(35.2)
Nonoperating income (expense)	21.9	24.7	62.0	(38.4)
Net (loss) income before taxes	1.6	(137.9)	(50.3)	(70.5)
Income tax	0.0	(0.1)	0.0	0.0
Net (loss) income	1.6	(138.0)	(50.3)	(70.5)
Comprehensive (loss) income	$ 1.6	$ (138.0)	$ (50.3)	$ (70.5)
(Loss) earnings per common share - basic (in dollars per share)	$ 0.01	$ (0.78)	$ (0.29)	$ (0.64)
(Loss) earnings per common share - diluted (in dollars per share)	$ 0.01	$ (0.78)	$ (0.29)	$ (0.64)
Product revenue
Revenue
Revenue	$ 5.8	$ 12.6	$ 12.1	$ 6.9
Cost of sales
Cost of sales	(10.8)	(80.0)	(48.4)	(13.3)
Recycling service revenue
Revenue
Revenue	0.1	5.7	1.3	0.4
Cost of sales
Cost of sales	$ 0.0	$ (1.8)	$ 0.0	$ 0.0