Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Operating activities
Net income (loss)	$ (114,993)	$ 17,752	$ 18,822
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	32,127	17,832	12,984
Amortization and write-off of debt issuance costs	6,480	885	0
Stock-based compensation	8,009	7,654	7,075
Equity investment loss	21	831	7
Deferred income taxes	(41,910)	5,530	(811)
Loss on disposal of long-lived assets	1,176	1,282	851
Gain on acquisition	(3,828)	0	0
Impairment of goodwill and intangible assets	146,900	0	0
Other	16	15	24
Changes in operating assets and liabilities:
Accounts receivable, net of allowance for bad debt	(2,045)	(7,637)	(6,327)
Prepaid expenses	354	(614)	320
Income tax receivable/payable	2,432	(5,481)	1,935
Operating lease assets, net	1,373	2,606	(16)
Other assets	519	(1,517)	(165)
Accounts payable	(10,207)	8,026	(86)
Accrued compensation and benefits	(141)	(3,406)	1,907
Accrued liabilities	2,917	(4,432)	3,612
Deferred revenue and student deposits	15	(23,061)	4,678
Net cash provided by operating activities	29,215	16,265	44,810
Investing activities
Cash paid for acquisition, net of cash acquired	1,951	(325,509)	0
Capital expenditures	(16,389)	(11,828)	(4,926)
Proceeds from the sale of real property	765	672	767
Net cash used in investing activities	(13,673)	(336,665)	(4,159)
Financing activities
Cash paid for repurchase of common/restricted stock	(1,538)	(3,032)	(15,705)
Cash received from issuance of common stock	0	86,205	0
Cash received from issuance of preferred stock	39,691	0	0
Cash paid for principal on borrowings and finance leases	(73,864)	(2,188)	0
Cash received from borrowings	0	175,000	0
Cash paid for debt issuance costs	0	(13,644)	0
Net cash (used in) provided by financing activities	(35,711)	242,341	(15,705)
Net increase (decrease) in cash, cash equivalents, and restricted cash	(20,169)	(78,059)	24,946
Cash, cash equivalents, and restricted cash at beginning of period	149,627	227,686	202,740
Cash, cash equivalents, and restricted cash at end of period	129,458	149,627	227,686
Supplemental disclosures of cash flow information
Interest paid	12,496	3,676	0
Income taxes paid	$ 3,996	$ 7,464	$ 5,898