Note 11 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Allocated stock-based compensation expense	$ 2,148	$ 2,311	$ 7,618	$ 6,671
Cost of Subscription [Member]
Allocated stock-based compensation expense	65	37	182	98
Cost of Maintenance and Other Revenue [Member]
Allocated stock-based compensation expense	148	107	358	279
Cost of Professional Services [Member]
Allocated stock-based compensation expense	353	309	906	803
Selling and Marketing Expense [Member]
Allocated stock-based compensation expense	611	421	1,547	1,106
Research and Development Expense [Member]
Allocated stock-based compensation expense	442	338	1,170	895
General and Administrative Expense [Member]
Allocated stock-based compensation expense	$ 529	$ 1,099	$ 3,455	$ 3,490