SHORT-TERM AND LONG-TERM DEBT - Summary of short-term and long-term debt (Details) - USD ($)	Jun. 30, 2023	Sep. 30, 2022
SHORT-TERM AND LONG-TERM DEBT
Total debt	$ 45,838,878	$ 40,718,951
Less current maturities	33,107,695	27,224,867
Total long term debt	12,731,183	13,494,084
Line of credit payable to bank, final payment due by June 28, 2024
SHORT-TERM AND LONG-TERM DEBT
Total debt	16,200,000	12,500,000
Paycheck Protection Program loans from Small Business Administration, 1.0% simple interest, initially forgiven in the fiscal year ended September 30, 2021. Final forgiveness decision has not been determined.
SHORT-TERM AND LONG-TERM DEBT
Total debt	10,159,144	10,084,531
Term note payable to United Bank, WV Pipeline acquisition, final payment due by March 25, 2026
SHORT-TERM AND LONG-TERM DEBT
Total debt	1,963,324	2,529,421
Notes payable to finance companies due July 2023 through August 2026
SHORT-TERM AND LONG-TERM DEBT
Total debt	1,324,858	889,165
Note payable to finance company for insurance premiums financed final due November 2023 in monthly installments
SHORT-TERM AND LONG-TERM DEBT
Total debt	1,889,756	580,320
Notes payable to bank, final payment due November 2034
SHORT-TERM AND LONG-TERM DEBT
Total debt	827,019	867,383
Notes payable to bank, final payment due November 2025
SHORT-TERM AND LONG-TERM DEBT
Total debt	324,941	412,917
Notes payable to banks due October 2027
SHORT-TERM AND LONG-TERM DEBT
Total debt	2,739,910
Notes payable to David and Daniel Bolton due final payment December 31, 2026
SHORT-TERM AND LONG-TERM DEBT
Total debt	1,652,500	2,380,000
Notes payable to bank, monthly interest rate at 9.25%, final payment due September 2026
SHORT-TERM AND LONG-TERM DEBT
Total debt	2,030,636	2,549,281
Term notes payable to United Bank, Tri-State Paving acquisition, final payment due by June 1, 2027
SHORT-TERM AND LONG-TERM DEBT
Total debt	6,024,254	6,982,097
Notes payable to Corns Enterprises, final payment due April 29, 2026
SHORT-TERM AND LONG-TERM DEBT
Total debt	$ 702,536	$ 943,836