REVENUE - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2020
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Capitalized costs, amortization	$ 0.2	$ 0.1	$ 0.4	$ 0.4
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, contractual term			36 months
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation, contractual term			60 months
Prepaid Expenses and Other Current Assets
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Capitalized costs	0.4		$ 0.4		$ 0.4
Other Noncurrent Assets
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Capitalized costs	$ 1.9		$ 1.9		$ 1.8