Finance leases and other debt - Schedule of interest income (expense), net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2024	Jan. 31, 2023	Jan. 31, 2022
Debt Disclosure [Abstract]
Interest expense	$ (1,854)	$ (1,411)	$ (1,163)
Interest income	4,065	2,475	79
Interest income (expense), net	$ 2,211	$ 1,064	$ (1,084)

Amount of the cost of borrowed funds accounted for as interest expense.

Amount of operating interest income, including, but not limited to, amortization and accretion of premiums and discounts on securities.