Warranty (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2025	Oct. 31, 2024	Oct. 31, 2025	Oct. 31, 2024
Warranty claim activity
Beginning balance	$ 500	$ 500	$ 500	$ 500
Provision	84	60	160	111
Costs incurred	(84)	(60)	(160)	(111)
Ending balance	$ 500	$ 500	$ 500	$ 500
Maximum
Warranty [Line Items]
Product warranty period			10 years