SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Accounts Receivable (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Allowance for Doubtful Accounts Receivable [Roll Forward]
Balance Beginning of Year	$ 132	$ 102	$ 78
Charges to Expense	111	81	62
Write-offs /Recoveries	(81)	(51)	(38)
Balance End of Year	$ 162	$ 132	$ 102