Note 1 - Summary of Business and Significant Accounting Policies - Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Interest income	$ (923)	$ (2,782)	$ (2,600)
Interest expense	591	630	643
Foreign exchange losses (gains)	2,018	(50)	(229)
Change in fair value of interest rate swap	93	368	51
Other expense, net	98
Other income, net		(250)	(209)
Total other expense (income), net	$ 1,877	$ (2,084)	$ (2,344)