CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended				9 Months Ended		12 Months Ended
	Sep. 30, 2023	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 2,064	$ (109)	$ 3,544	$ 272	$ 19,205	$ 4,076
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization					4,656	4,618
Deferred income taxes					0	64
Gain on sale of assets					(30,923)	(178)
Impairment of goodwill and long-lived assets	0		0		4,220	0
Fixed asset donations					(239)	(245)
Provision for credit losses	12,747				31,347	24,888
Stock-based compensation expense					4,050	2,367
(Increase) decrease in assets:
Accounts receivable					(39,240)	(32,467)
Inventories					(317)	7
Prepaid income taxes and income taxes payable					997	(503)
Prepaid expenses and current assets					(124)	2,550
Other assets, net					2,023	329
Increase (decrease) in liabilities:
Accounts payable					6,374	3,800
Accrued expenses					4,017	(5,631)
Unearned tuition					(2,310)	(2,661)
Other liabilities					(124)	(402)
Total adjustments					(15,593)	(3,464)
Net cash provided by operating activities					3,612	612
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures					(28,685)	(7,053)
Proceeds from sale of property and equipment					33,310	2,390
Proceeds from short-term investment					14,758	0
Purchase of short-term investment					(24,344)	0
Net cash used in investing activities					(4,961)	(4,663)
CASH FLOWS FROM FINANCING ACTIVITIES:
Dividend payment for preferred stock					0	(912)
Share repurchase					(891)	(6,733)
Net share settlement for equity-based compensation					(2,054)	(1,992)
Net cash used in financing activities					(2,945)	(9,637)
NET DECREASE IN CASH, CASH EQUIVALENTS AND RESTRICTED CASH					(4,294)	(13,688)
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - Beginning of period		$ 50,287		$ 83,307	50,287	83,307	$ 83,307
CASH, CASH EQUIVALENTS AND RESTRICTED CASH - End of period	$ 45,993		$ 69,619		45,993	69,619	$ 50,287
Cash paid for:
Interest					94	132
Income taxes					6,002	1,216
SUPPLEMENTAL SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Liabilities accrued for or noncash additions of fixed assets					$ 1,126	$ 501