Note 6 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Allocated stock-based compensation expense	$ 11,354	$ 10,122	$ 8,924
Cost of Subscription [Member]
Allocated stock-based compensation expense	315	252	161
Cost of Maintenance and Other Revenue [Member]
Allocated stock-based compensation expense	540	497	384
Cost of Professional Services [Member]
Allocated stock-based compensation expense	1,456	1,219	1,085
Selling and Marketing Expense [Member]
Allocated stock-based compensation expense	2,057	2,111	1,510
Research and Development Expense [Member]
Allocated stock-based compensation expense	1,863	1,620	1,226
General and Administrative Expense [Member]
Allocated stock-based compensation expense	$ 5,123	$ 4,423	$ 4,558