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Note 11 - Major Customers (Details Textual) - Revenue Benchmark [Member] - Customer Concentration Risk [Member]	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
DK Trading and Supply, LLC [Member]
Concentration Risk, Percentage	81.00%	76.00%
Energy Transfer Crude Marketing, LLC [Member]
Concentration Risk, Percentage	10.00%	19.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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