Note 10 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2017	Jul. 31, 2016	Jul. 31, 2017	Jul. 31, 2016
Allocated stock-based compensation expense	$ 2,592	$ 2,093	$ 4,360	$ 3,701
Cost of Subscription [Member]
Allocated stock-based compensation expense	36	27	61	49
Cost of Maintenance and Other Revenue [Member]
Allocated stock-based compensation expense	95	73	172	140
Cost of Professional Services [Member]
Allocated stock-based compensation expense	274	212	494	385
Selling and Marketing Expense [Member]
Allocated stock-based compensation expense	368	321	685	598
Research and Development Expense [Member]
Allocated stock-based compensation expense	304	249	557	486
General and Administrative Expense [Member]
Allocated stock-based compensation expense	$ 1,515	$ 1,211	$ 2,391	$ 2,043