Note 10 - Supplemental Financial Data - Oil and Gas Producing Activities (Unaudited): Standardized Measure of Discounted Cash Flows (Details) - USD ($)	Sep. 30, 2024	Sep. 30, 2023
Details
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Future Cash Inflow	$ 130,000	$ 105,000
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Production Cost	(15,000)	(12,000)
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Future Net Cash Flow, before Discount	115,000	93,000
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Discount	(43,000)	(27,000)
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow, Future Net Cash Flow, after Discount	$ 72,000	$ 66,000