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DEBT AND OTHER FINANCING ARRANGEMENTS - Term Facility with Antara (Details) - USD ($)
9 Months Ended
Mar. 31, 2021
Oct. 09, 2019
Debt Instrument [Line Items]    
Write off of unamortized debt issuance costs and debt discount $ 2,600,000  
Line of Credit | 2020 Antara Term Facility | Term Facility    
Debt Instrument [Line Items]    
Maximum borrowing capacity   $ 30,000,000