Note 1 - Summary of Business and Significant Accounting Policies - Other (Income) Expense, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2015
Interest income	$ (696)	$ (320)	$ (242)
Interest expense	670	712	811
Foreign exchange gains	180	(503)	(878)
Change in fair value of interest rate swap	(485)	48	877
Other income, net	(131)	(302)	(168)
Total other (income) expense, net	$ (462)	$ (365)	$ 400