Note 1 - Summary of Business and Significant Accounting Policies - Accounts Receivable, Net (Details) - USD ($) $ in Thousands	Jan. 31, 2017	Jan. 31, 2016
Accounts receivable	$ 71,647	$ 68,154
Doubtful accounts	(1,090)	(1,242)
Sales adjustments	(1,116)	(1,400)
Accounts receivable, net	$ 69,441	$ 65,512