Note 10 - Leases - Lease Costs (Details) - USD ($) $ in Thousands		3 Months Ended
		Apr. 30, 2023	Apr. 30, 2022
Amortization of ROU assets		$ 53	$ 64
Interest on lease liabilities		3	10
Operating lease costs		456	107
Operating lease costs		(456)	(107)
Short-term lease costs (1)	[1]	179	66
Sub-lease income		(20)	(20)
Total Lease costs		$ 671	$ 13

[1] Includes variable lease costs, which are immaterial.