STUDENT RECEIVABLES, Summary (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Student Receivables [Abstract]
Write off period for student receivable balance	150 days
Accounts receivables	$ 17,360	$ 17,504
Retained earnings	69,065	69,279
Deferred income taxes, net	$ 22,796	$ 23,217
Adjustment [Member] | Accounting Standards Update 2016-13 [Member]
Student Receivables [Abstract]
Accounts receivables			$ 10,800
Retained earnings			(7,900)
Deferred income taxes, net			$ 2,900