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LEASES - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Leases [Abstract]    
Base rent $ 1.6 $ 1.2
Capital lease obligations 0.1  
Assets under capital leases, gross 2.4  
Assets under capital leases, accumulated depreciation 2.4  
Capital lease amortization included in depreciation expense $ 0.1 $ 0.4