Note 5 - Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2018	Jan. 31, 2017	Jan. 31, 2016
Allocated stock-based compensation expense	$ 8,924	$ 7,323	$ 7,440
Cost of Subscription [Member]
Allocated stock-based compensation expense	161	113	76
Cost of Maintenance and Other Revenue [Member]
Allocated stock-based compensation expense	384	299	271
Cost of Professional Services [Member]
Allocated stock-based compensation expense	1,085	848	739
Selling and Marketing Expense [Member]
Allocated stock-based compensation expense	1,510	1,200	1,377
Research and Development Expense [Member]
Allocated stock-based compensation expense	1,226	1,009	900
General and Administrative Expense [Member]
Allocated stock-based compensation expense	$ 4,558	$ 3,854	$ 4,077