Common stock and additional paid-in capital - Schedule of Stock Option Activity (Details) - $ / shares		2 Months Ended	12 Months Ended
	Aug. 10, 2021	Dec. 31, 2022	Dec. 31, 2023	Oct. 31, 2022	Oct. 31, 2021
Number of stock options
Beginning balance (in shares)		4,510,651	4,368,732	5,296,554	5,327,980
Grants (in shares)		0	1,088,500	763,829	2,320,989
Exercises (in shares)	(28,779)	(141,919)	(1,581,424)	(1,547,113)	(2,172,820)
Forfeitures/cancellations/expirations (in shares)		0	(157,122)	(2,619)	(179,595)
Number of stock options (in shares)		4,368,732	3,718,686	4,510,651	5,296,554
Exercisable stock options (in shares)			1,963,937
Weighted average exercise price
Beginning balance (in dollars per share)		$ 4.46	$ 4.58	$ 2.81	$ 0.38
Grants (in dollars per share)		0	5.76	7.81	6.13
Exercises (in dollars per share)		0.81	0.74	0.46	0.62
Forfeitures/cancellations/expirations (in dollars per share)		0	9.80	10.93	1.06
Ending balance (in dollars per share)		4.58	6.34	4.46	2.81
Exercisable stock options (in dollars per share)			5.85
Range of exercises prices (in dollars per share)		$ 4.58	$ 6.34	$ 4.46	$ 2.81