Note 10 - Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Weighted average remaining lease term, Operating leases (Year)	1 year 11 months 23 days	1 year 9 months 25 days
Weighted average discount rate, Operating leases	13.00%	13.00%
Operating cash flows from operating leases	$ (858)	$ (1,196)
Right-of-use assets obtained in exchange for lease liabilities, Operating leases	$ 819	$ 772