SEGMENTS (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($) Segment
SEGMENTS [Abstract]
Number of reportable operating segments | Segment					2
Estimated cost to close campus	$ 2,000		$ 2,000
Summary financial information by reporting segment [Abstract]
Revenues	$ 99,618	$ 91,813	$ 275,548	$ 256,510
Percentage of Total Revenue	100.00%	100.00%	100.00%	100.00%
Operating Income (Loss)	$ 1,996	$ 4,880	$ 24,397	$ 4,951
Total Assets	315,778		315,778		$ 291,566
Campus Operations [Member]
Summary financial information by reporting segment [Abstract]
Revenues	99,527	90,085	274,093	251,216
Reportable Segments [Member] | Campus Operations [Member]
Summary financial information by reporting segment [Abstract]
Revenues	$ 99,527	$ 90,085	$ 274,093	$ 251,216
Percentage of Total Revenue	99.90%	98.10%	99.50%	97.90%
Operating Income (Loss)	$ 11,889	$ 13,024	$ 26,167	$ 30,430
Total Assets	207,617		207,617		190,473
Reportable Segments [Member] | Transitional [Member]
Summary financial information by reporting segment [Abstract]
Revenues	$ 91	$ 1,728	$ 1,455	$ 5,294
Percentage of Total Revenue	0.10%	1.90%	0.50%	2.10%
Operating Income (Loss)	$ (745)	$ (76)	$ (1,423)	$ (227)
Total Assets	572		572		1,498
Corporate [Member]
Summary financial information by reporting segment [Abstract]
Revenues	0	0	0	0
Operating Income (Loss)	(9,148)	$ (8,068)	(347)	$ (25,252)
Total Assets	$ 107,589		$ 107,589		$ 99,595