Note 11 - Supplemental Financial Data - Oil and Gas Producing Activities (Unaudited): Standardized Measure of Discounted Cash Flows (Details) - USD ($)	Sep. 30, 2025	Sep. 30, 2024
Details
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Future Cash Inflow	$ 137,000	$ 130,000
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Production Cost	(16,000)	(15,000)
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Future Net Cash Flow, before Discount	121,000	115,000
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Discount	(50,000)	(43,000)
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Future Net Cash Flow, after Discount	$ 71,000	$ 72,000

Amount of discount on future accumulated cash inflow, after deducting future accumulated cash outflow for development and production costs and future income tax, from sale of proved oil and gas reserves, using a discount rate of 10 percent a year.

- Definition

Amount of discounted future accumulated cash inflow relating to proved oil and gas reserves.

+ References

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+ Details

ALTEX INDUSTRIES INC 10-K