Note 11 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Allocated stock-based compensation expense	$ 3,364	$ 2,592	$ 5,470	$ 4,360
Cost of Subscription [Member]
Allocated stock-based compensation expense	68	36	117	61
Cost of Maintenance and Other Revenue [Member]
Allocated stock-based compensation expense	118	95	210	172
Cost of Professional Services [Member]
Allocated stock-based compensation expense	327	274	553	494
Selling and Marketing Expense [Member]
Allocated stock-based compensation expense	534	368	936	685
Research and Development Expense [Member]
Allocated stock-based compensation expense	413	304	728	557
General and Administrative Expense [Member]
Allocated stock-based compensation expense	$ 1,904	$ 1,515	$ 2,926	$ 2,391