REVENUE RECOGNITION (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
REVENUE RECOGNITION [Abstract]
Unearned tuition	$ 20,979		$ 24,154
Revenue recognized included in contract liability	22,700
Disaggregation of Revenue [Abstract]
Total revenues	87,284	$ 82,554
Services Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	4,708	4,789
Services Transferred over Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	82,576	77,765
Campus Operations [Member]
Disaggregation of Revenue [Abstract]
Total revenues	86,352	80,781
Campus Operations [Member] | Services Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	4,699	4,711
Campus Operations [Member] | Services Transferred over Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	81,653	76,070
Transitional [Member]
Disaggregation of Revenue [Abstract]
Total revenues	932	1,773
Transitional [Member] | Services Transferred at a Point in Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	9	78
Transitional [Member] | Services Transferred over Time [Member]
Disaggregation of Revenue [Abstract]
Total revenues	$ 923	$ 1,695