Note 4 - Revenue From Contracts With Customers - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2025	Apr. 30, 2024
Contract assets, balance	$ 20	$ 26
Revenue accrued	42	0
Amounts billed	(20)	(10)
Contract assets, balance	42	16
Contract liabilities, balance	1,792	3,649
Deferred revenue and customer deposits	1,574	625
Revenue recognized	(1,045)	(745)
Contract liabilities, balance	$ 2,321	$ 3,529