PROPERTY AND EQUIPMENT, NET - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 4.9	$ 5.7	$ 5.7
Assets under capital leases, gross	2.4	3.1
Assets under capital leases, accumulated depreciation	2.4	2.7
Capital lease amortization included in depreciation expense	0.1	0.4	0.4
Property and equipment used for rental program
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 3.6	$ 4.6	$ 4.9