Condensed Consolidated Statements of Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenues	$ 42,275	$ 65,766	$ 85,808	$ 130,871
Costs and operating expenses:
Cost of revenue (exclusive of depreciation and amortization presented separately below)	3,817	5,746	8,763	11,204
Sales and marketing	26,324	37,476	53,405	77,575
Technology and development	11,380	10,780	21,635	21,973
General and administrative	10,937	13,853	22,661	26,531
Depreciation and amortization	3,785	4,591	7,445	8,903
Total costs and operating expenses	56,243	72,446	113,909	146,186
Loss from operations	(13,968)	(6,680)	(28,101)	(15,315)
Interest income	279	13	306	28
Other income	0	42	0	667
Gain (loss) from equity method investment	96	(357)	1,845	(686)
Loss before income taxes	(13,593)	(6,982)	(25,950)	(15,306)
Provision for (benefit from) income taxes	(2,574)	133	(2,517)	227
Net loss	(11,019)	(7,283)	(23,433)	(15,701)
Other comprehensive loss:
Comprehensive loss	(11,019)	(7,283)	(23,433)	(15,701)
Net loss from continuing operations	(11,019)	(7,115)	(23,433)	(15,533)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	$ 0	$ (168)	$ 0	$ (168)
Continuing operations (in dollars per share)	$ (0.12)	$ (0.07)	$ (0.25)	$ (0.16)
Discontinuing operations, basic (in dollars per share)	$ 0	$ 0	$ 0	$ 0
Weighted average common shares outstanding, basic (in shares)	91,016	98,810	93,457	98,696