SHORT-TERM AND LONG-TERM DEBT - Revolving line of credit (Details) - Line of credit payable to bank, final payment due by June 28, 2028	Jun. 28, 2026 USD ($)	Jun. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)
SHORT-TERM AND LONG-TERM DEBT
Maximum capacity	$ 30,000,000
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	esoa:SecuredOvernightFinancingRateSofrOneMonthTermMember
Eligible borrowing base		$ 21,942,645	$ 27,657,997
Borrowed on line of credit		12,250,000	24,750,000
Line of credit balance available		$ 9,692,645	$ 2,907,997
Interest rate at period end (as a percent)		6.75%	7.50%
Debt instrument covenant, minimum fixed charge coverage ratio	1.25
Ratio to be maintained by borrower for maximum senior funded debt to EBDITA	2.75