Note 12 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2019	Oct. 31, 2018	Oct. 31, 2019	Oct. 31, 2018
Allocated stock-based compensation expense	$ 2,904	$ 2,148	$ 8,396	$ 7,618
Cost of Subscription [Member]
Allocated stock-based compensation expense	84	65	226	182
Cost of Maintenance and Other Revenue [Member]
Allocated stock-based compensation expense	143	148	396	358
Cost of Professional Services [Member]
Allocated stock-based compensation expense	404	353	1,085	906
Selling and Marketing Expense [Member]
Allocated stock-based compensation expense	607	611	1,562	1,547
Research and Development Expense [Member]
Allocated stock-based compensation expense	492	442	1,360	1,170
General and Administrative Expense [Member]
Allocated stock-based compensation expense	$ 1,174	$ 529	$ 3,767	$ 3,455