Note 12 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 30, 2020	Jul. 31, 2021	Jul. 30, 2020
Allocated stock-based compensation expense	$ 4,745	$ 3,951	$ 8,382	$ 6,356
Cost of Subscription [Member]
Allocated stock-based compensation expense	127	139	239	246
Cost of Maintenance and Other Revenue [Member]
Allocated stock-based compensation expense	120	120	247	229
Cost of Professional Services [Member]
Allocated stock-based compensation expense	392	412	777	749
Selling and Marketing Expense [Member]
Allocated stock-based compensation expense	669	720	1,438	1,228
Research and Development Expense [Member]
Allocated stock-based compensation expense	559	560	1,168	1,011
General and Administrative Expense [Member]
Allocated stock-based compensation expense	$ 2,878	$ 2,000	$ 4,513	$ 2,893