Note 11 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Allocated stock-based compensation expense	$ 3,951	$ 3,188	$ 6,356	$ 5,492
Cost of Subscription [Member]
Allocated stock-based compensation expense	139	72	246	142
Cost of Maintenance and Other Revenue [Member]
Allocated stock-based compensation expense	120	132	229	253
Cost of Professional Services [Member]
Allocated stock-based compensation expense	412	359	749	681
Selling and Marketing Expense [Member]
Allocated stock-based compensation expense	720	575	1,228	955
Research and Development Expense [Member]
Allocated stock-based compensation expense	560	441	1,011	868
General and Administrative Expense [Member]
Allocated stock-based compensation expense	$ 2,000	$ 1,609	$ 2,893	$ 2,593