CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (unaudited) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenue		$ 118,821	$ 116,986
Cost of revenue	[1],[2],[3]	20,557	22,903
Gross profit		98,264	94,083
Operating expenses:
Research and development	[1],[3]	32,665	36,716
Sales and marketing	[1],[2],[3]	47,919	59,636
General and administrative	[1],[3]	31,737	27,917
Restructuring	[1],[2]	7,197	4,883
Total operating expenses		119,518	129,152
Loss from operations		(21,254)	(35,069)
Interest expense		4,148	2,226
Other non-operating income, net		(2,038)	(134)
Loss before income taxes		(23,364)	(37,161)
Provision for income taxes		451	216
Net loss		$ (23,815)	$ (37,377)
Net loss per common share, basic		$ (0.16)	$ (0.25)
Net loss per common share, diluted		$ (0.16)	$ (0.25)
Weighted average number of basic shares outstanding		149,345	150,262
Weighted average number of diluted shares outstanding		149,345	150,262

[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 pending merger with an investor consortium led by STG during the three months ended March 31, 2023. See Note 1 for additional information. Also includes transaction expenses associated with the terminated merger with Zendesk, Inc. (“Zendesk”) during the three months ended March 31, 2022: