REVENUE RECOGNITION (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
REVENUE RECOGNITION [Abstract]
Unearned tuition	$ 22,928		$ 22,928		$ 24,154
Revenue recognized included in contract liability			22,600
Disaggregation of Revenue [Abstract]
Total revenues	88,646	$ 82,142	175,929	$ 164,697
Services Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	5,898	4,973	10,607	9,763
Services Transferred over Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	82,748	77,169	165,322	154,934
Campus Operations [Member]
Disaggregation of Revenue [Abstract]
Total revenues	88,213	80,349	174,565	161,130
Campus Operations [Member] | Services Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	5,895	4,886	10,595	9,598
Campus Operations [Member] | Services Transferred over Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	82,318	75,463	163,970	151,532
Transitional [Member]
Disaggregation of Revenue [Abstract]
Total revenues	433	1,793	1,364	3,567
Transitional [Member] | Services Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	3	87	12	165
Transitional [Member] | Services Transferred over Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	$ 430	$ 1,706	$ 1,352	$ 3,402