Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2018	Jul. 31, 2017	Jul. 31, 2018	Jul. 31, 2017
Revenue:
Revenues	$ 84,543	$ 75,958	$ 170,733	$ 147,340
Costs of revenue:
Costs of revenues	40,436	36,694	81,503	71,560
Gross profit	44,107	39,264	89,230	75,780
Operating expenses:
Sales and marketing	19,502	17,697	39,448	35,284
Research and development	13,513	11,689	27,519	23,221
General and administrative	9,366	9,224	18,728	17,817
Amortization of intangibles from acquisitions		111		274
Total operating expenses	42,381	38,721	85,695	76,596
Operating income (loss)	1,726	543	3,535	(816)
Other (income) expense:
Interest income	(743)	(493)	(1,267)	(661)
Interest expense	154	157	311	313
Other (income) expense, net	(269)	1,208	(673)	1,812
Total other (income) expense	(858)	872	(1,629)	1,464
Income (loss) before income taxes	2,584	(329)	5,164	(2,280)
Income tax expense	1,471	832	2,654	1,452
Net income (loss)	1,113	(1,161)	2,510	(3,732)
Diluted net (loss) income per share
Net income (loss)	1,113	(1,161)	2,510	(3,732)
Other comprehensive income, net of tax:
Foreign currency translation adjustment	(326)	1,132	(836)	1,772
Total comprehensive income (loss)	787	(29)	1,674	(1,960)
Common Class A [Member]
Other (income) expense:
Net income (loss)	$ 954	$ (994)	$ 2,150	$ (3,193)
Basic net income (loss) per share
Basic net (loss) income per share (in dollars per share)	$ 0.06	$ (0.06)	$ 0.13	$ (0.20)
Diluted net (loss) income per share
Diluted net (loss) income per share (in dollars per share)	$ 0.05	$ (0.06)	$ 0.12	$ (0.20)
Net income (loss)	$ 954	$ (994)	$ 2,150	$ (3,193)
Common Class B [Member]
Other (income) expense:
Net income (loss)	$ 159	$ (167)	$ 360	$ (539)
Basic net income (loss) per share
Basic net (loss) income per share (in dollars per share)	$ 0.05	$ (0.05)	$ 0.11	$ (0.17)
Diluted net (loss) income per share
Diluted net (loss) income per share (in dollars per share)	$ 0.05	$ (0.05)	$ 0.11	$ (0.17)
Net income (loss)	$ 159	$ (167)	$ 360	$ (539)
Subscription and Circulation [Member]
Revenue:
Revenues	22,439	17,420	43,950	32,763
Costs of revenue:
Costs of revenues	8,334	7,428	16,562	15,148
License [Member]
Revenue:
Revenues	5,561	6,743	11,827	12,008
Costs of revenue:
Costs of revenues	574	828	1,238	1,513
Maintenance [Member]
Revenue:
Revenues	30,574	31,971	62,057	63,877
Costs of revenue:
Costs of revenues	7,774	7,840	15,639	15,534
Professional Services [Member]
Revenue:
Revenues	25,969	19,824	52,899	38,692
Costs of revenue:
Costs of revenues	$ 23,754	$ 20,598	$ 48,064	$ 39,365