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PROPERTY, PLANT AND EQUIPMENT (Details) - USD ($)
Sep. 30, 2025
Sep. 30, 2024
PROPERTY, PLANT AND EQUIPMENT    
Property, plant and equipment $ 115,448,972 $ 91,885,621
Less accumulated depreciation 61,981,005 53,749,907
Total fixed assets 53,467,967 38,135,714
Land    
PROPERTY, PLANT AND EQUIPMENT    
Property, plant and equipment 3,569,840 3,258,838
Buildings and leasehold improvements    
PROPERTY, PLANT AND EQUIPMENT    
Property, plant and equipment 12,376,476 11,534,943
Operating equipment and vehicles    
PROPERTY, PLANT AND EQUIPMENT    
Property, plant and equipment 98,037,108 75,768,103
Office equipment, furniture and fixtures    
PROPERTY, PLANT AND EQUIPMENT    
Property, plant and equipment 1,054,451 1,235,965
Assets not yet in service    
PROPERTY, PLANT AND EQUIPMENT    
Property, plant and equipment $ 411,097 $ 87,772