REVENUE - Additional Information (Details) $ in Millions	3 Months Ended	9 Months Ended
	Mar. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Capitalized costs, amortization	$ 0.1	$ 0.2
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
Current assets
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Capitalized costs	0.3	$ 0.3
Noncurrent assets
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Capitalized costs	$ 1.3	$ 1.3