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Note 9 - Segment Information and Major Customers - Segment Information by Major Customers (Details) - Customer Concentration Risk [Member] - Revenue Benchmark [Member]
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Oil Purchasers [Member] | Apa Corporation [Member]    
APA Corporation 22.00% 55.00%
Oil Purchasers [Member] | Civita Resources Inc. [Member]    
APA Corporation 20.00%  
Oil Purchasers [Member] | Plains All American Inc [Member]    
APA Corporation 19.00% 16.00%
Oil Purchasers [Member] | DE IV Operating LLC. [Member]    
APA Corporation 14.00%  
Natural Gas And Liquids [Member] | Apa Corporation [Member]    
APA Corporation 17.00% 58.00%
Natural Gas And Liquids [Member] | Civita Resources Inc. [Member]    
APA Corporation 10.00%  
Natural Gas And Liquids [Member] | Targa Pipeline Mid Continent West Tex L L C [Member]    
APA Corporation   11.00%