CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenue	$ 97,522	$ 132,565	$ 205,183	$ 262,762
Costs and expenses
Cost of revenue	30,888	45,049	73,984	94,616
Sales and marketing	26,724	59,983	61,194	118,115
General and administrative	8,170	30,246	39,617	59,981
Product development	22,839	55,752	59,358	111,824
Restructuring costs	2,387	10,861	13,902	10,838
Gain on divestiture	0	0	(17,591)	0
Amortization of purchased intangible assets	876	923	1,750	1,822
Total costs, expenses and other	91,884	202,814	232,214	397,196
Income (loss) from operations	5,638	(70,249)	(27,031)	(134,434)
Other income (expense), net:
Interest income (expense), net	136	(682)	1,937	(2,114)
Other income (expense), net	4,893	(3,266)	19,555	(3,206)
Total Income (loss) before (benefit from) provision for income taxes	5,029	(3,948)	21,492	(5,320)
Income (loss) before (benefit from) provision for income taxes	10,667	(74,197)	(5,539)	(139,754)
(Benefit from) provision for income taxes	(155)	1,214	1,059	1,021
Net income (loss)	$ 10,822	$ (75,411)	$ (6,598)	$ (140,775)
Net income (loss) per share of common stock:
Basic net loss per common share (in dollars per share)	$ 0.14	$ (0.98)	$ (0.09)	$ (1.84)
Diluted net loss per common share (in dollars per share)	$ 0.12	$ (0.98)	$ (0.09)	$ (1.84)
Weighted average shares outstanding:
Weighted average shares outstanding used in basic net loss per common share calculation (in shares)	76,902,416	77,290,465	76,341,729	76,555,518
Weighted average shares outstanding used in diluted net loss per common share calculation (in shares)	91,500,059	77,290,465	76,341,729	76,555,518