Note 2 - Summary of Significant Accounting Policies - Allowance for Credit Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2023	Apr. 30, 2022
Balance as of February 1, 2023	$ 221
Additions (reductions) from provision for credit loss expense	70	$ (320)
Balance as of April 30, 2023	$ 291