SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance Beginning of Year	$ 78	$ 63	$ 34
Charges to Expense	62	20	34
Write-offs /Recoveries	(38)	(5)	(5)
Balance End of Year	$ 102	$ 78	$ 63