Note 10 - Leases - Lease Costs (Details) - USD ($) $ in Thousands		3 Months Ended
		Apr. 30, 2022	Apr. 30, 2021
Amortization of ROU assets		$ 64	$ 54
Interest on lease liabilities		10	13
Operating lease costs		(107)	(648)
Operating lease costs		107	648
Short-term lease costs (1)	[1]	66	93
Sub-lease income		(20)	(20)
Total Lease costs		$ 13	$ 788

[1] Includes variable lease costs, which are immaterial