REVENUE - Additional Information (Details) (Details) $ in Millions	3 Months Ended	6 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Amortization of capitalized contract costs	$ 0.1	$ 0.1
Prepaid Expenses and Other Current Assets
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Capitalized costs to obtain contracts	0.3	0.3
Noncurrent assets
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Capitalized costs to obtain contracts	$ 1.3	$ 1.3