INCOME TAXES - UNRECOGNIZED TAX BENEFITS (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance—beginning of period	$ 880	$ 779	$ 293
Additions—current year tax positions	180	181	135
Additions—prior year tax positions	17	0	568
Reductions—prior year tax positions	(212)	(80)	(217)
Total liability for unrecognized tax positions—end of period	$ 865	$ 880	$ 779