Note 3 - Related-Party Transactions (Details Textual) - USD ($) $ in Thousands				3 Months Ended			9 Months Ended
	Apr. 01, 2025	Apr. 01, 2023	Nov. 01, 2022	Sep. 30, 2025		Sep. 30, 2024	Sep. 30, 2025		Sep. 30, 2024	Jul. 01, 2025	Jun. 01, 2025	Jan. 01, 2025	Sep. 01, 2024	Jan. 01, 2023
Management Fee Expense				$ 279		$ 202	$ 737		$ 628
Operating Lease, Expense				300		300	900		900
LE Term Loan Due 2034 [Member] | Veritex Community Bank [Member]
Debt Instrument, Face Amount												$ 25,000
LRM Term Loan Due 2034 [Member] | Veritex Community Bank [Member]
Debt Instrument, Face Amount														$ 10,000
Cash Fee, Percentage of Outstanding Principal Balance														2.00%
BDEC Term Loan Due 2051 [Member] | Small Business Administration SBA [Member]
Debt Instrument, Face Amount														$ 2,000
Cash Fee, Percentage of Outstanding Principal Balance														2.00%
Fourth Amended and Restated Operating Agreement [Member]
Agreement Term (Year)	1 year
Related Party Transaction, Written Notice Period (Year)	90 years
Management Fee Percentage	5.00%
Lazarus Energy Holdings (LEH) [Member]
Sublease Income				20		10	50		20
Ground Lease Income				45		0	45		0
Management Fee Expense				300		200	700		600
Lazarus Energy Holdings (LEH) [Member] | Office Lease of Corporate Headquarters in Houston, Texas [Member]
Sublease, Monthly Rent													$ 5
Sublease Income				20		$ 10	50		$ 20
Lazarus Energy Holdings (LEH) [Member] | Ground Lease For Nixon facility [Member]
Ground Lease, Monthly Rent										$ 15
Lazarus Energy Holdings (LEH) [Member] | Jet Fuel Sales Agreement [Member]
Agreement Term (Year)		1 year
Lazarus Energy Holdings (LEH) [Member] | Terminal Services Agreement [Member]
Agreement Term (Year)			1 year
Monthly Tank Rental Fee			$ 200
Ingleside Crude, LLC [Member] | Master Services Agreement [Member]
Monthly Tank Rental Fee												$ 100
Jonathan Carroll [Member] | NPS Term Loan Due 2031 [Member] | Greater Nevada Credit Union (GNCU) [Member]
Debt Instrument, Face Amount														$ 10,000
Cash Fee, Percentage of Outstanding Principal Balance														2.00%
Jonathan Carroll [Member] | LE Amended and Restated Guaranty Fee Agreement [Member]
Cash Fee, Percentage of Outstanding Principal Balance														2.00%
Related Party [Member] | Affiliate Revolving Credit Agreement [Member] | Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 15,000	[1]		$ 15,000	[1]			$ 15,000

[1] Effective June 1, 2025, the maximum borrowing limit under the agreement was increased to $15.0 million; see "Note (15)" for additional disclosures. As of June 30, 2025, $10.2 million was drawn under the agreement.