Note 5 - Derivative Financial Instruments - Price Risk Derivative Contracts (Details) - Forecast [Member]	3 Months Ended
Dec. 31, 2027 MMBTU $ / MMBTU $ / bbl bbl	Sep. 30, 2027 MMBTU $ / MMBTU $ / bbl bbl	Jun. 30, 2027 MMBTU $ / MMBTU $ / bbl bbl	Mar. 31, 2027 MMBTU $ / MMBTU $ / bbl bbl	Dec. 31, 2026 MMBTU $ / MMBTU $ / bbl bbl	Sep. 30, 2026 MMBTU $ / MMBTU $ / bbl bbl
Crude Oil Derivative Collar [Member] \| Not Designated as Hedging Instrument [Member]
Jul – Sep (Barrel of Oil) \| bbl			4,000	8,900	10,800	13,000
Jul – Sep (in USD per Barrel of Oil)			0	0	0	0
Jul – Sep (in USD per Barrel of Oil)			52	59.78	61.67	61.38
Jul – Sep (in USD per Barrel of Oil)			62.85	65.24	68.52	69.39
Natural Gas Derivative Swap [Member] \| Not Designated as Hedging Instrument, Trading [Member]
Jul – Sep (Millions of British Thermal Unit) \| MMBTU				19,667	30,000	30,000
Jul – Sep (in USD per Millions of British Thermal Unit) \| $ / MMBTU				4.3	4.3	4.3
Natural Gas Derivative Basis Swap [Member]
Jul – Sep (Millions of British Thermal Unit) \| MMBTU	10,000	10,000	10,000	10,000	10,000
Jul – Sep (in USD per Millions of British Thermal Unit) \| $ / MMBTU	(1.43)	(1.43)	(1.43)	(1.43)	(1.138)
Natural Gas Derivative Basis Swap [Member] \| Not Designated as Hedging Instrument, Trading [Member]
Jul – Sep (Millions of British Thermal Unit) \| MMBTU	15,000	15,000	15,000	15,000	15,000
Jul – Sep (in USD per Millions of British Thermal Unit) \| $ / MMBTU	(1.525)	(1.525)	(1.525)	(1.525)	(1.667)
Crude Oil Derivative Swap [Member] \| Not Designated as Hedging Instrument [Member]
Jul – Sep (Barrel of Oil) \| bbl	7,500	8,950	6,470	4,400	5,000	5,000
Jul – Sep (in USD per Barrel of Oil)	70.42	61.46	59.61	62.14	63.45	63.45
Jul – Sep (in USD per Barrel of Oil)	0	0	0	0	0	0
Jul – Sep (in USD per Barrel of Oil)	0	0	0	0	0	0
Crude Oil Derivative Roll Swap [Member] \| Not Designated as Hedging Instrument [Member]
Jul – Sep (Barrel of Oil) \| bbl					25,000	26,011
Jul – Sep (in USD per Barrel of Oil)					4.23	4.3
Jul – Sep (in USD per Barrel of Oil)					0
Jul – Sep (in USD per Barrel of Oil)					0	0
Crude Oil Derivative Basis Swap [Member] \| Not Designated as Hedging Instrument [Member]
Jul – Sep (Barrel of Oil) \| bbl	10,000	10,000	10,000	10,000	23,000	23,000
Jul – Sep (in USD per Barrel of Oil)	1	1	1	1	1.37	1.37
Jul – Sep (in USD per Barrel of Oil)	0	0	0	0	0	0
Jul – Sep (in USD per Barrel of Oil)	0	0	0	0	0	0

The cap rate on a price risk derivative such as a cap or collar. A payment or receipt is triggered if the market rate exceeds the cap rate on the contract.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-5

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- Definition

Floor rate on a price risk derivative such as a floor or a collar. A payment or receipt is triggered if the market rate falls below the floor rate on the contract.

+ References

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- Definition

Nominal energy measure used to calculate payments on a derivative instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480434/815-10-50-5

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- Definition

Nominal volume used to calculate payments on a derivative instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 181
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480401/815-10-55-181

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- Definition

The strike price on the price risk option contract such as a put option or a call option.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SX 210.12-13(Column A)(Footnote 3))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 5
-Subparagraph (SX 210.12-13(Column E))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477271/946-320-S99-5

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- Definition

Fixed price related to the price risk swap derivative.

+ References

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