REVENUE RECOGNITION - Allowance for Doubtful Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of June 30, 2019	$ 2,025	$ 1,200
Provision for doubtful accounts	5,958
Write-offs	(1,084)
Balance as of June 30, 2020	$ 6,899	$ 2,025