Note 11 - Leases - Lease Costs (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Amortization of ROU assets		$ 59	$ 65	$ 176	$ 184
Interest on lease liabilities		6	13	24	42
Operating lease costs		608	620	1,195	1,890
Short-term lease costs (1)	[1]	99	255	171	454
Sub-lease income		(20)	(20)	(61)	(61)
Total Lease costs		$ 752	$ 933	$ 1,505	$ 2,509

[1] Includes variable lease costs, which are immaterial