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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized expense $ 0.0    
SARs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 3 years 3 years  
Unrecognized compensation expense $ 0.0    
Weighted average period of recognition 0 days    
SARs | Former Chief Executive Officer      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period   2 years  
SARs | Tranche One      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting   20.00%  
SARs | Tranche Two      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting   20.00%  
SARs | Tranche Three      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting   60.00%  
Employee Stock Option      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 3 years    
Expiration period 10 years    
Weighted average period of recognition 0 days    
Employee Stock Option | Executives      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period     3 years
Employee Stock Option | Non-Employee Directors      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period     1 year
Employee Stock Option | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 3 years    
Employee Stock Option | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 5 years    
Employee Stock Option | Tranche One      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting 20.00%    
Employee Stock Option | Tranche Two      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting 20.00%    
Employee Stock Option | Tranche Three      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting 60.00%    
RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 3 years    
Unrecognized compensation expense $ 1.0    
Weighted average period of recognition 2 years    
Vested in period, fair value $ 1.5 $ 0.3 $ 0.5
RSUs | Non-Employee Directors      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 1 year    
RSUs | Minimum | Grant Date Anniversary      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 1 year    
RSUs | Minimum | Period after Grant Date      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 1 year    
RSUs | Median | Period after Grant Date      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 3 years    
RSUs | Maximum | Grant Date Anniversary      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 5 years    
RSUs | Maximum | Period after Grant Date      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 5 years    
RSUs | Tranche One      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting 20.00%    
RSUs | Tranche Two      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting 20.00%    
RSUs | Tranche Three      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting 60.00%    
2018 Long Term Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for issuance (in shares) 415,945    
Number of shares available for grant (in shares) 228,989    
Participants' age required under award vesting terms 62 years    
Employees' age required under award vesting terms 55 years    
Number of years of continuous service to be completed by an employee under award vesting terms 15 years    
2018 Plan, 2016 Plan and 2004 Plan | SARs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 3 years    
Expiration period 10 years    
2018 Plan, 2016 Plan and 2004 Plan | SARs | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 3 years    
2018 Plan, 2016 Plan and 2004 Plan | SARs | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting or performance period 5 years    
2018 Plan, 2016 Plan and 2004 Plan | SARs | Tranche One      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting 20.00%    
2018 Plan, 2016 Plan and 2004 Plan | SARs | Tranche Two      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting 20.00%    
2018 Plan, 2016 Plan and 2004 Plan | SARs | Tranche Three      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting 60.00%