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RETIREMENT AND EMPLOYEE BENEFIT PLANS - C.J. Hughes retirement plan (Details) - Union Employees Retirement Plan - C J Hughes Construction Company - USD ($) | 12 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024
RETIREMENT AND EMPLOYEE BENEFIT PLANS |  |
Percentage of employees contribution to retirement compensation plan | 15.00% | 15.00%
Maximum amount of employees contribution | $ 23,500 | $ 23,000
Amount of contribution matched per dollar | $ 0.25 | $ 0.25
Percentage of contribution of eligible wages | 6.00% | 6.00%
Amount of contribution to union plan | $ 74,000 | $ 37,000

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