Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue:
Total revenue	$ 96,233	$ 82,043	$ 205,064	$ 158,063
Cost of revenue:
Total cost of revenue	9,635	9,295	22,682	17,295
Gross profit	86,598	72,748	182,382	140,768
Operating expenses:
Research and development	23,256	16,381	49,437	30,453
Sales and marketing	57,941	48,185	123,106	86,635
General and administrative	23,195	16,470	47,738	36,370
Total operating expenses	104,392	81,036	220,281	153,458
Loss from operations	(17,794)	(8,288)	(37,899)	(12,690)
Interest expense	(9,496)	(3,098)	(18,799)	(6,084)
Other income, net	4,530	847	2,068	3,676
Loss before provision for (benefit of) income taxes	(22,760)	(10,539)	(54,630)	(15,098)
Provision for (benefit of) income taxes	12,533	(7,320)	(3,864)	(17,793)
Net income (loss)	$ (35,293)	$ (3,219)	$ (50,766)	$ 2,695
Net income (loss) per share attributable to common stockholders, basic (in dollars per share)	$ (0.53)	$ (0.05)	$ (0.77)	$ 0.04
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share)	$ (0.53)	$ (0.05)	$ (0.77)	$ 0.04
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, basic	66,039	62,613	65,804	62,271
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, diluted	66,039	62,613	65,804	67,994
Other comprehensive income, net of tax:
Net unrealized holding gain on investments, net of tax	$ 1,817	$ 212	$ 3,060	$ 914
Foreign currency translation adjustments	613	1,193	1,611	182
Other comprehensive income, net of tax	2,430	1,405	4,671	1,096
Total comprehensive income (loss)	(32,863)	(1,814)	(46,095)	3,791
Subscription-based software license
Revenue:
Total revenue	34,646	36,841	85,390	71,649
Cost of revenue:
Total cost of revenue	946	1,073	2,927	1,848
PCS and services
Revenue:
Total revenue	61,587	45,202	119,674	86,414
Cost of revenue:
Total cost of revenue	$ 8,689	$ 8,222	$ 19,755	$ 15,447