Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Revenue	$ 785,015,000	$ 824,156,000	$ 916,961,000
Cost of services	252,305,000	286,919,000	338,714,000
Gross profit	532,710,000	537,237,000	578,247,000
Operating expenses:
Sales and marketing	225,692,000	254,433,000	287,797,000
Research and development	39,111,000	15,713,000	12,741,000
General and administrative	211,198,000	217,296,000	208,880,000
Impairment charges	0	83,094,000	268,846,000
Total operating expenses	476,001,000	570,536,000	778,264,000
Operating income (loss)	56,709,000	(33,299,000)	(200,017,000)
Other income (expense):
Interest expense, nonoperating	(34,758,000)	(46,771,000)	(61,728,000)
Net periodic pension (cost) benefit	(8,817,000)	24,806,000	2,719,000
Other income (expense)	3,909,000	(10,734,000)	(1,518,000)
Income (loss) before income tax (expense) benefit	17,043,000	(65,998,000)	(260,544,000)
Income tax (expense) benefit	(16,736,000)	(8,218,000)	1,249,000
Net income (loss)	307,000	(74,216,000)	(259,295,000)
Other comprehensive (loss) income:
Foreign currency translation adjustment, net of tax	(570,000)	250,000	1,070,000
Comprehensive loss	$ (263,000)	$ (73,966,000)	$ (258,225,000)
Net income (loss) per common share:
Basic (in USD per share)	$ 0.01	$ (2.00)	$ (7.47)
Diluted (in USD per share)	$ 0.01	$ (2.00)	$ (7.47)
Weighted-average shares used in computing basic and diluted net income (loss) per common share:
Basic (in shares)	43,621,796	37,142,271	34,723,491
Diluted (in shares)	44,476,869	37,142,271	34,723,491
Nonrelated Party
Other income (expense):
Interest expense, nonoperating	$ (23,430,000)	$ (36,494,000)	$ (61,728,000)
Related Party
Other income (expense):
Interest expense, nonoperating	$ (11,328,000)	$ (10,277,000)	$ 0