FAIR VALUE MEASUREMENTS - Schedule of Impairments (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets	$ (11,092)	$ (11,366)	$ (10,478)
Impairment charge			(13,000)
Empire Education Group Inc
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charge			(13,000)
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets	(11,092)	(7,943)	(7,057)
Fair Value, Measurements, Nonrecurring | Fair Value, Inputs, Level 3 | Empire Education Group Inc
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impairment charge	$ 0	$ 0	$ (12,954)