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DISCONTINUED OPERATIONS (Tables) | 12 Months Ended
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Sep. 30, 2025
Discontinued Operations and Disposal Groups [Abstract] |
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures | The following amounts which summarize the total assets and liabilities related to discontinued activities have been segregated from Griffon’s continuing operations, and are reported as assets and liabilities of discontinued operations in the Consolidated Balance Sheets:
| At September 30, 2025 |  | At September 30, 2024
Assets of discontinued operations: |  |  |
Prepaid and other current assets | $ | 1,302 |  |  | $ | 648 |
Other long-term assets | 4,699 |  |  | 3,417 |
Total assets of discontinued operations | $ | 6,001 |  |  | $ | 4,065 |
Liabilities of discontinued operations: |  |  |
Accrued liabilities, current | $ | 3,956 |  |  | $ | 4,498 |
Other long-term liabilities | 4,770 |  |  | 3,270 |
Total liabilities of discontinued operations | $ | 8,726 |  |  | $ | 7,768 |

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