Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Revenue	$ 624,559	$ 600,545	$ 606,328
Costs and expenses:
Instructional costs and services	295,703	292,862	288,472
Selling and promotional	128,810	132,955	154,649
General and administrative	141,961	128,239	120,352
Depreciation and amortization	19,303	27,816	32,127
Impairment of goodwill and intangible assets	0	64,000	146,900
Loss on assets held for sale (Note 6)	1,618	2,425	0
Loss on leases (Note 8)	3,715	0	0
Loss on disposals of long-lived assets	383	554	1,176
Total costs and expenses	591,493	648,851	743,676
(Loss) income from operations before interest and income taxes	33,066	(48,306)	(137,348)
Gain on acquisition (Note 3)	0	0	3,828
Interest expense, net	(2,127)	(4,459)	(17,728)
(Loss) income from operations before income taxes	30,939	(52,765)	(151,248)
Income tax (benefit) expense	10,419	(10,715)	(36,276)
Equity investment loss	(4,407)	(5,236)	(21)
Net (loss) income	16,113	(47,286)	(114,993)
Preferred stock dividends	6,056	6,008	48
Net income (loss) available to common stockholders basic	10,057	(53,294)	(115,041)
Net income (loss) available to common stockholders diluted	$ 10,057	$ (53,294)	$ (115,041)
Net (loss) income per common share:
Basic (in dollars per share)	$ 0.57	$ (2.94)	$ (6.10)
Diluted (in dollars per share)	$ 0.55	$ (2.93)	$ (6.08)
Weighted average number of shares outstanding:
Basic (in shares)	17,625	18,112	18,859
Diluted (in shares)	18,149	18,193	18,914