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SIGNIFICANT ACCOUNTING POLICIES - Advertising Costs (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Selling, General and Administrative Expenses      
Property, Plant and Equipment [Line Items]      
Advertising costs $ 6.5 $ 4.8 $ 5.0