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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
	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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