Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Revenue	$ 152,895	$ 147,214	$ 307,327	$ 296,903
Costs and expenses:
Instructional costs and services	76,216	74,998	148,641	148,887
Selling and promotional	33,838	32,966	66,294	72,890
General and administrative	34,426	32,533	70,703	66,022
Depreciation and amortization	5,232	7,953	10,360	15,709
Impairment of goodwill and intangible assets	0	64,000	0	64,000
Loss on leases (Note 4)	779	0	3,715	0
Loss on disposals of long-lived assets	184	32	212	33
Total costs and expenses	150,675	212,482	299,925	367,541
Income (loss) from operations before interest and income taxes	2,220	(65,268)	7,402	(70,638)
Interest expense, net	(785)	(1,097)	(911)	(2,876)
Income (loss) before income taxes	1,435	(66,365)	6,491	(73,514)
Income tax (benefit) expense	(16)	(15,137)	1,197	(16,551)
Equity investment loss	(1,080)	(4)	(4,407)	(9)
Net income (loss)	371	(51,232)	887	(56,972)
Preferred stock dividends	1,531	1,487	3,066	2,944
Net loss available to common stockholders basic	(1,160)	(52,719)	(2,179)	(59,916)
Net loss available to common stockholders diluted	$ (1,160)	$ (52,719)	$ (2,179)	$ (59,916)
Loss per common share:
Basic (in dollars per share)	$ (0.07)	$ (2.94)	$ (0.12)	$ (3.25)
Diluted (in dollars per share)	$ (0.06)	$ (2.93)	$ (0.12)	$ (3.23)
Weighted average number of common shares:
Basic (in shares)	17,627	17,932	17,568	18,457
Diluted (in shares)	18,134	17,991	17,986	18,531