CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Revenue		$ 116,986	$ 102,298
Cost of revenue	[1],[2],[3]	22,903	20,772
Gross profit		94,083	81,526
Operating expenses:
Research and development	[1],[3]	36,716	32,983
Sales and marketing	[1],[2],[3]	59,636	52,036
General and administrative	[1],[3]	27,917	23,322
Restructuring	[1],[2]	4,883	0
Total operating expenses		129,152	108,341
Loss from operations		(35,069)	(26,815)
Interest expense		2,226	2,299
Other non-operating (income) expense, net		(134)	315
Loss before income taxes		(37,161)	(29,429)
Provision for income taxes		216	218
Net loss		$ (37,377)	$ (29,647)
Net loss per share, basic and diluted		$ (0.25)	$ (0.20)
Weighted-average shares used in computing basic and diluted net loss per share		150,262	144,692

[1] (1) Includes stock-based compensation, net of amounts capitalized as follows:

[2] (2) Includes amortization of acquisition intangible assets as follows:

[3] (3) Includes transaction expenses associated with the terminated merger with Zendesk. See Note 1 for additional information.