Note 6 - Leases - Lease Costs (Details) - USD ($) $ in Thousands		12 Months Ended
		Jan. 31, 2022	Jan. 31, 2021
Amortization of ROU assets		$ 245	$ 214
Interest on lease liabilities		53	69
Operating lease costs		2,502	2,570
Short-term lease costs (1)	[1]	591	398
Sub-lease income		(81)	(81)
Total Lease costs		$ 3,310	$ 3,170

[1] Includes variable lease costs, which are immaterial