Note 7 - Derivative Instruments - Schedule Outstanding Volumes (Details) - Energy Related Derivative [Member] - Forecast [Member]	3 Months Ended
	Sep. 30, 2027 MWh BTU	Mar. 31, 2027 MWh BTU	Dec. 31, 2026 MWh BTU	Sep. 30, 2026 MWh BTU	Jun. 30, 2026 MWh BTU	Mar. 31, 2026 MWh BTU	Dec. 31, 2025 MWh BTU	Sep. 30, 2025 MWh BTU
Electricity [Member]
Volume (Megawatt-Hour) | MWh	3,440	0	0	9,152	0	0	0	37,520
Oil and Gas [Member]
Volume (Megawatt-Hour) | BTU	0	225,000	152,500	0	0	1,350,000	1,070,001	152,500