CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenue:
Total revenue	$ 58,409	$ 64,718	$ 217,229	$ 205,209
Operating costs and expenses:
Marketing and advertising	29,665	29,035	95,185	85,343
Customer care and enrollment	39,321	38,901	100,773	93,951
Technology and content	12,264	13,241	38,613	42,047
General and administrative	20,297	22,937	62,318	72,310
Impairment, restructuring and other charges	61	0	9,409	0
Total operating costs and expenses	101,608	104,114	306,298	293,651
Loss from operations	(43,199)	(39,396)	(89,069)	(88,442)
Interest expense	(2,859)	(2,822)	(8,517)	(8,122)
Other income, net	1,699	2,684	6,425	7,500
Loss before income taxes	(44,359)	(39,534)	(91,161)	(89,064)
Benefit from income taxes	(1,886)	(2,509)	(3,736)	(8,660)
Net loss	(42,473)	(37,025)	(87,425)	(80,404)
Preferred stock dividends	(5,643)	(5,320)	(16,603)	(15,644)
Change in preferred stock redemption value	(5,832)	(4,898)	(16,619)	(12,158)
Net loss attributable to common stockholders	$ (53,948)	$ (47,243)	$ (120,647)	$ (108,206)
Net loss per share attributable to common stockholders:
Basic (in dollars per share)	$ (1.83)	$ (1.68)	$ (4.13)	$ (3.88)
Diluted (in dollars per share)	$ (1.83)	$ (1.68)	$ (4.13)	$ (3.88)
Weighted-average number of shares used in per share amounts:
Basic (in shares)	29,485	28,114	29,211	27,863
Diluted (in shares)	29,485	28,114	29,211	27,863
Comprehensive loss:
Net loss	$ (42,473)	$ (37,025)	$ (87,425)	$ (80,404)
Unrealized holding gain (loss) on available for sale debt securities, net of tax	99	(15)	78	5
Foreign currency translation adjustments	118	73	130	(65)
Comprehensive loss	(42,256)	(36,967)	(87,217)	(80,464)
Commission
Revenue:
Total revenue	48,222	57,239	185,996	185,428
Other
Revenue:
Total revenue	$ 10,187	$ 7,479	$ 31,233	$ 19,781