REVENUES - Incremental Costs of Obtaining a Contract with a Customer (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Capitalized Contract Cost [Roll Forward]
Capitalized costs to obtain a contract, beginning balance	$ 48,284	$ 35,151
New capitalized costs incurred	29,427	24,347
Amortization of capitalized costs	(16,919)	(11,003)
Adjustments on account of foreign exchange	371	(211)
Capitalized costs to obtain a contract, ending balance	61,163	48,284
Impairment loss	$ 0	$ 0