Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue:
Total revenue	$ 129,717	$ 103,397	$ 334,781	$ 261,460
Cost of revenue:
Total cost of revenue	10,414	9,645	33,096	26,940
Gross profit	119,303	93,752	301,685	234,520
Operating expenses:
Research and development	25,232	17,755	74,669	48,208
Sales and marketing	60,920	43,779	184,026	130,414
General and administrative	23,518	20,282	71,256	56,652
Total operating expenses	109,670	81,816	329,951	235,274
Income (loss) from operations	9,633	11,936	(28,266)	(754)
Interest expense	(9,603)	(6,477)	(28,402)	(12,561)
Other income, net	5,137	145	7,205	3,821
Loss on induced conversion and debt extinguishment	(1)	(20,507)	(1)	(20,507)
Income (Loss) before provision for (benefit of) income taxes	5,166	(14,903)	(49,464)	(30,001)
Provision for (benefit of) income taxes	809	(8,663)	(3,055)	(26,456)
Net income (loss)	$ 4,357	$ (6,240)	$ (46,409)	$ (3,545)
Net income (loss) per share attributable to common stockholders, basic (in dollars per share)	$ 0.07	$ (0.10)	$ (0.70)	$ (0.06)
Net income (loss) per share attributable to common stockholders, diluted (in dollars per share)	$ 0.06	$ (0.10)	$ (0.70)	$ (0.06)
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, basic (in shares)	66,265	63,966	65,895	62,842
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders, diluted (in shares)	69,774	63,966	65,895	62,842
Other comprehensive income (loss), net of tax:
Net unrealized holding gain (loss) on investments, net of tax	$ (1,310)	$ (2)	$ 1,750	$ 912
Foreign currency translation adjustments	(1,250)	(133)	361	49
Other comprehensive income (loss), net of tax	(2,560)	(135)	2,111	961
Total comprehensive income (loss)	1,797	(6,375)	(44,298)	(2,584)
Subscription-based software license
Revenue:
Total revenue	63,144	54,332	148,534	125,981
Cost of revenue:
Total cost of revenue	1,022	1,082	3,949	2,930
PCS and services
Revenue:
Total revenue	66,573	49,065	186,247	135,479
Cost of revenue:
Total cost of revenue	$ 9,392	$ 8,563	$ 29,147	$ 24,010