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RETIREMENT AND EMPLOYEE BENEFIT PLANS - Energy Services of America retirement plan (Details) - USD ($)	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Non Union Employees Retirement Plan | Nitro Electric And C. J. Hughes Construction Company merger
RETIREMENT AND EMPLOYEE BENEFIT PLANS
Defined contribution plan employer matching contribution percent of each dollar contributed for the first 3%	100.00%
Defined contribution plan employer matching contribution percent of each dollar contributed for the next 3%	50.00%
Retirement Plan | Energy Services of America
RETIREMENT AND EMPLOYEE BENEFIT PLANS
Amount of contribution to union plan	$ 1,100,000	$ 864,000

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