Note 10 - Commitments and Contingencies (Details Textual)	1 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2024 USD ($) bbl	Sep. 30, 2024 USD ($) bbl	Sep. 30, 2024 USD ($) T bbl	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jul. 01, 2022 T
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other noncurrent assets	Other noncurrent assets	Other noncurrent assets				Other noncurrent assets
Operating Lease, Right-of-Use Asset	$ 406,000	$ 406,000	$ 406,000				$ 510,000
Operating Lease, Liability	416,000	416,000	416,000				528,000
Operating Lease, Liability, Current	$ 290,000	$ 290,000	$ 290,000				528,000
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Operating Lease, Liability, Current	Operating Lease, Liability, Current	Operating Lease, Liability, Current
Operating Lease, Liability, Noncurrent	$ 126,000	$ 126,000	$ 126,000				$ 0
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Operating Lease, Liability, Noncurrent	Operating Lease, Liability, Noncurrent	Operating Lease, Liability, Noncurrent
Contributions in Aid of Construction	$ 2,700,000	$ 2,700,000	$ 2,700,000
TXU Energy Retail Company LLC [Member]
Letters of Credit Outstanding, Amount						$ 4,600,000
Forecast [Member]
Contributions in Aid of Construction				$ 27,200,000	$ 2,700,000
Crude Oil Delivery Commitments [Member]
Supply Commitment, Minimum Volume Commitment	$ 138,700,000	$ 138,700,000	$ 138,700,000
Supply Commitment, Gross Barrels of Oil Delivered Per Day, Remaining Term of Contract (Barrel of Oil) | bbl	23,500	23,500	23,500
Supply Commitment, First Ten Years (Year)	10 years
Number of Barrels, Delivered (Barrel of Oil) | bbl		28,255
Supply Commitment, Amount Committed	$ 133,900,000	$ 133,900,000	$ 133,900,000
Sand Commitments [Member]
Supply Commitment, Amount Committed	$ 10,200,000	$ 10,200,000	$ 10,200,000
Supply Commitment, Minimum Tons of Sand (US Ton) | T								750,000
Supply Commitment, Tons of Sand Received (US Ton) | T			349,000
Supply Commitment, Tons of Sand Remaining (US Ton) | T			401,000