Note 7 - Supplemental Information Relating to Oil and Gas Producing Activities (Unaudited) - Estimated Quantities of Proved Oil and Gas Reserves (Details)	12 Months Ended
	Dec. 31, 2024 Mcf bbl	Dec. 31, 2023 Mcf bbl
Oil [Member]
Beginning Balance | bbl	287,000	398,000
Extensions, discoveries and other additions | bbl		7,000
Production | bbl	(31,000)	(33,000)
Revision of previous estimates | bbl	(4,000)	(85,000)
Ending Balance | bbl	252,000	287,000
Natural Gas [Member]
Beginning Balance | Mcf	7,953,000	21,713,000
Extensions, discoveries and other additions | Mcf		109,000
Production | Mcf	(1,077,000)	(1,226,000)
Revision of previous estimates | Mcf	(793,000)	(12,643,000)
Ending Balance | Mcf	6,083,000	7,953,000