Note 11 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Allocated stock-based compensation expense	$ 3,770	$ 2,904	$ 10,126	$ 8,396
Cost of Subscription [Member]
Allocated stock-based compensation expense	156	84	402	226
Cost of Maintenance and Other Revenue [Member]
Allocated stock-based compensation expense	125	143	354	396
Cost of Professional Services [Member]
Allocated stock-based compensation expense	449	404	1,198	1,085
Selling and Marketing Expense [Member]
Allocated stock-based compensation expense	792	607	2,020	1,562
Research and Development Expense [Member]
Allocated stock-based compensation expense	607	492	1,618	1,360
General and Administrative Expense [Member]
Allocated stock-based compensation expense	$ 1,641	$ 1,174	$ 4,534	$ 3,767