Note 4 - Revenue From Contracts With Customers - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024
Contract assets, balance	$ 20	$ 26
Revenue accrued	12	102
Amounts billed	(20)	(26)
Contract assets, balance	12	102
Contract liabilities, balance	1,792	3,649
Deferred revenue and customer deposits	1,186	760
Revenue recognized	(1,646)	(1,255)
Contract liabilities, balance	$ 1,332	$ 3,154