Note 10 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016
Allocated stock-based compensation expense	$ 2,311	$ 1,820	$ 6,671	$ 5,521
Cost of Subscription [Member]
Allocated stock-based compensation expense	37	32	98	81
Cost of Maintenance and Other Revenue [Member]
Allocated stock-based compensation expense	107	80	279	219
Cost of Professional Services [Member]
Allocated stock-based compensation expense	309	232	803	618
Selling and Marketing Expense [Member]
Allocated stock-based compensation expense	421	306	1,106	904
Research and Development Expense [Member]
Allocated stock-based compensation expense	338	262	895	748
General and Administrative Expense [Member]
Allocated stock-based compensation expense	$ 1,099	$ 908	$ 3,490	$ 2,951