Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Jan. 31, 2017
Revenue:
Revenues	$ 333,016	$ 305,018	$ 277,973
Costs of revenue:
Costs of revenues	155,884	149,425	130,851
Gross profit	177,132	155,593	147,122
Operating expenses
Sales and marketing	78,207	75,368	67,194
Research and development	53,993	47,661	43,587
General and administrative	35,248	35,222	32,318
Amortization of intangible assets from acquisitions	111	416	659
Total operating expenses	167,559	158,667	143,758
Operating income (loss)	9,573	(3,074)	3,364
Other (income) expense:
Interest income	(2,600)	(1,547)	(696)
Interest expense	643	669	670
Other (income) expense, net	(387)	2,012	(436)
Total other (income) expense, net	(2,344)	1,134	(462)
Income (loss) before income taxes	11,917	(4,208)	3,826
Income tax expense	1,489	4,857	19,276
Net income (loss)	10,428	(9,065)	(15,450)
Diluted net income (loss) per share:
Net income (loss)	10,428	(9,065)	(15,450)
Other comprehensive (loss) income
Foreign currency translation adjustment	(833)	1,803	98
Total comprehensive income (loss)	9,595	(7,262)	(15,352)
Common Class A [Member]
Other (income) expense:
Net income (loss)	$ 8,939	$ (7,762)	$ (13,211)
Basic net income (loss) per share:
Basic net (loss) income per share (in dollars per share)	$ 0.55	$ (0.49)	$ (0.84)
Diluted net income (loss) per share:
Diluted net (loss) income per share (in dollars per share)	$ 0.50	$ (0.49)	$ (0.84)
Net income (loss)	$ 8,939	$ (7,762)	$ (13,211)
Common Class B [Member]
Other (income) expense:
Net income (loss)	$ 1,489	$ (1,303)	$ (2,239)
Basic net income (loss) per share:
Basic net (loss) income per share (in dollars per share)	$ 0.46	$ (0.41)	$ (0.70)
Diluted net income (loss) per share:
Diluted net (loss) income per share (in dollars per share)	$ 0.44	$ (0.41)	$ (0.70)
Net income (loss)	$ 1,489	$ (1,303)	$ (2,239)
Subscription and Circulation [Member]
Revenue:
Revenues	91,861	69,615	52,167
Costs of revenue:
Costs of revenues	34,128	30,563	27,027
License [Member]
Revenue:
Revenues	25,568	25,807	23,633
Costs of revenue:
Costs of revenues	2,714	2,946	2,990
Maintenance [Member]
Revenue:
Revenues	122,936	128,142	130,406
Costs of revenue:
Costs of revenues	31,307	31,246	30,517
Professional Services [Member]
Revenue:
Revenues	92,651	81,454	71,767
Costs of revenue:
Costs of revenues	$ 87,735	$ 84,670	$ 70,317