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GOODWILL AND INTANGIBLE ASSETS - Intangible assets subject to amortization (Details) - USD ($)
 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
GOODWILL AND INTANGIBLE ASSETS        
Original Cost $ 7,463,943   $ 7,463,943  
Accumulated Amortization and Impairment 2,568,860 $ 1,504,367 1,064,493 $ 438,623
Net Book Value $ 4,895,083 3,065,576 $ 4,895,083 3,065,576
Customer relationships | West Virginia Pipeline        
GOODWILL AND INTANGIBLE ASSETS        
Remaining Life 63 months   63 months  
Original Cost $ 2,209,724   $ 2,209,724  
Accumulated Amortization and Impairment 1,049,610 828,630 220,980 220,969
Net Book Value $ 1,160,114 1,381,094 $ 1,160,114 1,381,094
Customer relationships | Heritage Painting        
GOODWILL AND INTANGIBLE ASSETS        
Remaining Life 45 months   45 months  
Original Cost $ 121,100   $ 121,100  
Accumulated Amortization and Impairment 30,270 6,054 24,216 6,054
Net Book Value $ 90,830 115,046 $ 90,830 115,046
Customer relationships | Tri-State Paving        
GOODWILL AND INTANGIBLE ASSETS        
Remaining Life 79 months   79 months  
Original Cost $ 1,649,159   $ 1,649,159  
Accumulated Amortization and Impairment 563,463 398,547 164,916 164,916
Net Book Value $ 1,085,696 1,250,612 $ 1,085,696 1,250,612
Tradename | West Virginia Pipeline        
GOODWILL AND INTANGIBLE ASSETS        
Remaining Life 63 months   63 months  
Original Cost $ 263,584   $ 263,584  
Accumulated Amortization and Impairment 125,215 98,863 26,352 26,363
Net Book Value $ 138,369 164,721 $ 138,369 164,721
Tradename | Tri-State Paving        
GOODWILL AND INTANGIBLE ASSETS        
Remaining Life 79 months   79 months  
Original Cost $ 203,213   $ 203,213  
Accumulated Amortization and Impairment 69,431 49,110 20,321 20,321
Net Book Value $ 133,782 154,103 $ 133,782 $ 154,103
Tradename | Tribute Contracting & Consultants acquisition        
GOODWILL AND INTANGIBLE ASSETS        
Remaining Life 50 months   50 months  
Original Cost $ 80,000   $ 80,000  
Accumulated Amortization and Impairment 13,333   13,333  
Net Book Value $ 66,667   $ 66,667  
Tradename | Rigney Digital Systems        
GOODWILL AND INTANGIBLE ASSETS        
Remaining Life 132 months   132 months  
Original Cost $ 657,100   $ 657,100  
Net Book Value 657,100   657,100  
Non-competes | West Virginia Pipeline        
GOODWILL AND INTANGIBLE ASSETS        
Original Cost 83,203   83,203  
Accumulated Amortization and Impairment 83,203 83,203    
Non-competes | Tri-State Paving        
GOODWILL AND INTANGIBLE ASSETS        
Original Cost 39,960   $ 39,960  
Accumulated Amortization and Impairment $ 39,960 $ 39,960    
Non-competes | Rigney Digital Systems        
GOODWILL AND INTANGIBLE ASSETS        
Remaining Life 120 months   120 months  
Original Cost $ 46,300   $ 46,300  
Net Book Value $ 46,300   $ 46,300  
Non-compete 1 | Tribute Contracting & Consultants acquisition        
GOODWILL AND INTANGIBLE ASSETS        
Remaining Life 110 months   110 months  
Original Cost $ 520,000   $ 520,000  
Accumulated Amortization and Impairment 43,333   43,333  
Net Book Value $ 476,667   $ 476,667  
Non-compete 2 | Tribute Contracting & Consultants acquisition        
GOODWILL AND INTANGIBLE ASSETS        
Remaining Life 86 months   86 months  
Original Cost $ 10,000   $ 10,000  
Accumulated Amortization and Impairment 1,042   1,042  
Net Book Value $ 8,958   $ 8,958  
Backlog | Tribute Contracting & Consultants acquisition        
GOODWILL AND INTANGIBLE ASSETS        
Remaining Life 14 months   14 months  
Original Cost $ 1,320,000   $ 1,320,000  
Accumulated Amortization and Impairment 550,000   550,000  
Net Book Value $ 770,000   $ 770,000  
Backlog | Rigney Digital Systems        
GOODWILL AND INTANGIBLE ASSETS        
Remaining Life 24 months   24 months  
Original Cost $ 260,600   $ 260,600  
Net Book Value $ 260,600   $ 260,600