Note 12 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2021	Apr. 30, 2020
Allocated stock-based compensation expense	$ 3,637	$ 2,405
Cost of Subscription [Member]
Allocated stock-based compensation expense	112	107
Cost of Maintenance and Other Revenue [Member]
Allocated stock-based compensation expense	127	109
Cost of Professional Services [Member]
Allocated stock-based compensation expense	385	337
Selling and Marketing Expense [Member]
Allocated stock-based compensation expense	769	508
Research and Development Expense [Member]
Allocated stock-based compensation expense	609	451
General and Administrative Expense [Member]
Allocated stock-based compensation expense	$ 1,635	$ 893