Note 10 - Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021
Operating lease assets	$ 1,835	$ 1,471
Operating lease liabilities	1,835	1,471
Current liabilities	869	1,008
Non-current liabilities	966	463
Total Operating lease liabilities	$ 1,835	$ 1,471