Warranty (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Warranty claim activity
Beginning balance	$ 500	$ 500	$ 500	$ 500
Provision	33	21	76	51
Costs incurred	(33)	(21)	(76)	(51)
Ending balance	$ 500	$ 500	$ 500	$ 500
Maximum
Warranty [Line Items]
Product warranty period			10 years