Note 1 - Summary of Business and Significant Accounting Policies - Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Interest income	$ (1,547)	$ (696)	$ (320)
Interest expense	669	670	712
Foreign exchange losses (gains)	2,466	180	(503)
Change in fair value of interest rate swap	(377)	(485)	48
Other income, net	(77)	(131)	(302)
Total other expense (income), net	$ 1,134	$ (462)	$ (365)