Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2018	Oct. 31, 2017	Oct. 31, 2018	Oct. 31, 2017
Revenue:
Revenues	$ 79,577	$ 76,925	$ 250,310	$ 224,265
Costs of revenue:
Costs of revenues	37,361	38,046	118,864	109,606
Gross profit	42,216	38,879	131,446	114,659
Operating expenses:
Sales and marketing	18,447	17,697	57,895	52,981
Research and development	13,155	12,111	40,674	35,332
General and administrative	8,095	8,556	26,823	26,373
Amortization of intangibles from acquisitions	45	85	45	359
Total operating expenses	39,742	38,449	125,437	115,045
Operating income (loss)	2,474	430	6,009	(386)
Other (income) expense:
Interest income	(646)	(440)	(1,913)	(1,101)
Interest expense	177	195	488	508
Other (income) expense, net	(636)	(413)	(1,309)	1,399
Total other (income) expense	(1,105)	(658)	(2,734)	806
Income (loss) before income taxes	3,579	1,088	8,743	(1,192)
Income tax expense	597	1,249	3,251	2,701
Net income (loss)	2,982	(161)	5,492	(3,893)
Diluted net (loss) income per share
Net income (loss)	2,982	(161)	5,492	(3,893)
Other comprehensive income, net of tax:
Foreign currency translation adjustment	(1,174)	(743)	(2,010)	1,029
Total comprehensive income (loss)	1,808	(904)	3,482	(2,864)
Common Class A [Member]
Other (income) expense:
Net income (loss)	$ 2,557	$ (139)	$ 4,707	$ (3,332)
Basic net income (loss) per share
Basic net (loss) income per share (in dollars per share)	$ 0.16	$ (0.01)	$ 0.29	$ (0.21)
Diluted net (loss) income per share
Diluted net (loss) income per share (in dollars per share)	$ 0.14	$ (0.01)	$ 0.26	$ (0.21)
Net income (loss)	$ 2,557	$ (139)	$ 4,707	$ (3,332)
Common Class B [Member]
Other (income) expense:
Net income (loss)	$ 425	$ (22)	$ 785	$ (561)
Basic net income (loss) per share
Basic net (loss) income per share (in dollars per share)	$ 0.13	$ (0.01)	$ 0.24	$ (0.17)
Diluted net (loss) income per share
Diluted net (loss) income per share (in dollars per share)	$ 0.12	$ (0.01)	$ 0.23	$ (0.17)
Net income (loss)	$ 425	$ (22)	$ 785	$ (561)
Subscription and Circulation [Member]
Revenue:
Revenues	23,863	17,190	67,813	49,953
Costs of revenue:
Costs of revenues	8,686	7,605	25,248	22,753
License [Member]
Revenue:
Revenues	4,631	6,628	16,458	18,636
Costs of revenue:
Costs of revenues	534	690	1,772	2,203
Maintenance [Member]
Revenue:
Revenues	30,401	32,407	92,458	96,284
Costs of revenue:
Costs of revenues	7,716	7,840	23,355	23,374
Professional Services [Member]
Revenue:
Revenues	20,682	20,700	73,581	59,392
Costs of revenue:
Costs of revenues	$ 20,425	$ 21,911	$ 68,489	$ 61,276