v3.25.2
SHORT-TERM AND LONG-TERM DEBT - Summary of short-term and long-term debt - Parenthetical (Details) - USD ($)
9 Months Ended 12 Months Ended
Jun. 30, 2025
Sep. 30, 2024
Sep. 30, 2021
SHORT-TERM AND LONG-TERM DEBT      
Line of credit $ 23,878,282 $ 25,089,446  
Fair value of debt $ 42,000,000 24,700,000  
Line of credit payable to bank, final payment due by June 28, 2026      
SHORT-TERM AND LONG-TERM DEBT      
Interest rate 7.50%    
Equipment line of credit, Final payment due February 2028      
SHORT-TERM AND LONG-TERM DEBT      
Borrowed on line of credit $ 9,300,000    
Interest rate 7.25%    
Note payable in monthly or annual installments $ 202,809    
Paycheck Protection Program loans from Small Business Administration      
SHORT-TERM AND LONG-TERM DEBT      
Interest rate     1.00%
Term note payable to United Bank, WV Pipeline acquisition, final payment due by March 25, 2026      
SHORT-TERM AND LONG-TERM DEBT      
Interest rate 4.25%    
Note payable in monthly or annual installments $ 64,853    
Notes payable to finance companies, final payments due July 2025 through September 2028      
SHORT-TERM AND LONG-TERM DEBT      
Note payable in monthly or annual installments $ 219,000 $ 76,000  
Notes payable to finance companies, final payments due July 2025 through September 2028 | Minimum      
SHORT-TERM AND LONG-TERM DEBT      
Interest rate 0.00%    
Notes payable to finance companies, final payments due July 2025 through September 2028 | Maximum      
SHORT-TERM AND LONG-TERM DEBT      
Interest rate 6.00%    
Notes payable to United Bank, Tribute acquisition finance, final payments due December 2030 secured by receivables and equipment, guaranteed by certain directors of the Company.      
SHORT-TERM AND LONG-TERM DEBT      
Interest rate 6.90%    
Note payable in monthly or annual installments $ 272,016    
Notes payable to bank, final payment due November 2034      
SHORT-TERM AND LONG-TERM DEBT      
Interest rate 4.82%    
Note payable in monthly or annual installments $ 7,848    
Notes payable to bank, final payment due by October 2027      
SHORT-TERM AND LONG-TERM DEBT      
Interest rate 6.00%    
Note payable in monthly or annual installments $ 59,932    
Convertible equipment line of credit      
SHORT-TERM AND LONG-TERM DEBT      
Borrowed on line of credit 3,700,000    
Line of credit $ 5,000,000    
Interest rate 8.50%    
Line of credit principal payments $ 0    
Forty eight month term note      
SHORT-TERM AND LONG-TERM DEBT      
Interest rate on line of credit 2.75%    
Notes payable to David Bolton and Daniel Bolton due final payment December 31, 2025      
SHORT-TERM AND LONG-TERM DEBT      
Interest rate 3.25%    
Note payable in monthly or annual installments $ 500,000    
Note payable to United Bank, Tri-State Paving acquisition, final payment due by June 1, 2027      
SHORT-TERM AND LONG-TERM DEBT      
Interest rate 4.50%    
Note payable in monthly or annual installments $ 129,910    
Notes payable to Corns Enterprises, final payment due April 29, 2026      
SHORT-TERM AND LONG-TERM DEBT      
Interest rate 3.50%    
Note payable in monthly or annual installments $ 1,000,000    
Notes payable on annual installments 250,000    
Fair value of debt $ 936,000