Note 1 - Summary of Business and Significant Accounting Policies - Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Interest income	$ (2,782)	$ (2,600)	$ (1,547)
Interest expense	630	643	669
Foreign exchange (gains) losses	(50)	(229)	2,466
Change in fair value of interest rate swap	368	51	(377)
Other income, net	(250)	(209)	(77)
Total other (income) expense, net	$ (2,084)	$ (2,344)	$ 1,134