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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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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% |  |

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