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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND PRACTICES - Valuation of Accounts and Chargebacks Receivable and Concentration of Credit Risk (Details) - Customer Concentration Risk
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Trade Receivable | First Customer      
Concentration Risk [Line Items]      
Concentration risk, percentage 9.00% 13.00%  
Sales | First Customer      
Concentration Risk [Line Items]      
Concentration risk, percentage 11.00% 12.00% 11.00%
Sales | Second Customer      
Concentration Risk [Line Items]      
Concentration risk, percentage 8.00% 9.00% 10.00%