Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Income Statement [Abstract]
Revenue	$ 149,689	$ 154,747
Costs and expenses:
Instructional costs and services	73,889	71,698
Selling and promotional	39,924	39,319
General and administrative	33,489	29,589
Loss on disposals of long-lived assets	1	793
Depreciation and amortization	7,756	8,148
Total costs and expenses	155,059	149,547
(Loss) income from operations before interest and income taxes	(5,370)	5,200
Gain on acquisition (Note 3)	0	4,533
Interest expense	(1,779)	(3,355)
(Loss) income before income taxes	(7,149)	6,378
Income tax (benefit) expense	(1,414)	1,040
Equity investment loss	(5)	(5)
Net (loss) income	(5,740)	5,333
Preferred stock dividends	1,457	0
Net (loss) income available to common stockholders basic	(7,197)	5,333
Net (loss) income available to common stockholders diluted	$ (7,197)	$ 5,333
Earnings per common share:
Earnings per common share basic (in dollars per share)	$ (0.38)	$ 0.28
Diluted (in dollars per share)	$ (0.38)	$ 0.28
Weighted average number of common shares:
Basic (in shares)	18,982	18,805
Diluted (in shares)	19,072	18,879