CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenue	$ 270,014	$ 184,326	$ 542,764	$ 467,410
Costs and expenses:
Cost of revenue (exclusive of depreciation and amortization shown separately below)	13,934	13,464	27,829	27,716
Selling and marketing expense	185,206	113,921	382,668	309,459
General and administrative expense	39,811	28,489	74,800	60,571
Product development	13,290	10,812	25,758	21,775
Depreciation	4,443	3,550	8,161	6,928
Amortization of intangibles	11,310	13,756	22,622	27,513
Change in fair value of contingent consideration	(8,850)	9,175	(8,053)	1,053
Severance	0	32	0	190
Litigation settlements and contingencies	322	(1,325)	338	(996)
Total costs and expenses	259,466	191,874	534,123	454,209
Operating income (loss)	10,548	(7,548)	8,641	13,201
Other (expense) income, net:
Interest expense, net	(9,840)	(4,955)	(20,055)	(9,789)
Other income	0	7	40,072	7
Income (loss) before income taxes	708	(12,496)	28,658	3,419
Income tax benefit	9,092	3,880	454	6,941
Net income (loss) from continuing operations	9,800	(8,616)	29,112	10,360
Loss from discontinued operations, net of tax	(3,199)	(21,141)	(3,462)	(25,716)
Net income (loss) and comprehensive income (loss)	$ 6,601	$ (29,757)	$ 25,650	$ (15,356)
Weighted average shares outstanding:
Basic (in shares)	13,243	12,984	13,157	12,971
Diluted (in shares)	13,719	12,984	13,913	13,954
Income (loss) per share from continuing operations:
Basic (in dollars per share)	$ 0.74	$ (0.66)	$ 2.21	$ 0.80
Diluted (in dollars per share)	0.71	(0.66)	2.09	0.74
Loss per share from discontinued operations:
Basic (in dollars per share)	(0.24)	(1.63)	(0.26)	(1.98)
Diluted (in dollars per share)	(0.23)	(1.63)	(0.25)	(1.84)
Net income (loss) per share:
Basic (in dollars per share)	0.50	(2.29)	1.95	(1.18)
Diluted (in dollars per share)	$ 0.48	$ (2.29)	$ 1.84	$ (1.10)