Note 1 - Summary of Business and Significant Accounting Policies - Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Interest income	$ (2,600)	$ (1,547)	$ (696)
Interest expense	643	669	670
Foreign exchange (gains) losses	(229)	2,466	180
Change in fair value of interest rate swap	51	(377)	(485)
Other income, net	(209)	(77)	(131)
Total other (income) expense, net	$ (2,344)	$ 1,134	$ (462)