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Note 2 - Acquisitions and Dispositions (Details Textual)
3 Months Ended 6 Months Ended
Jun. 30, 2024
USD ($)
a
Mar. 31, 2024
USD ($)
a
Jun. 30, 2023
USD ($)
a
Mar. 31, 2023
USD ($)
a
Jun. 30, 2024
USD ($)
a
Jun. 30, 2023
USD ($)
a
Gain (Loss) on Disposition of Property Plant Equipment $ 205,000   $ 6,053,000   $ 636,000 $ 6,104,000
NEW MEXICO            
Area of Land | a 12 48     12  
Oil, Productive Well, Number of Wells, Net   23        
Proceeds from Sale, Land, Held-for-Use   $ 375,600        
MEXICO            
Proceeds from Sale, Land, Held-for-Use $ 150,600          
TEXAS            
Area of Land | a     55     55
Proceeds from Sale, Land, Held-for-Use     $ 6,000,000      
Proceeds from Divestiture of Businesses $ 55,000          
Payment for Acquisition, Land, Held-for-Use     $ 605,000      
Number Of Acres Sold (Acre) | a     320     320
TEXAS | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]            
Area of Land | a       7.8    
Proceeds from Sale, Land, Held-for-Use       $ 436,050    
TEXAS | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Land [Member]            
Gain (Loss) on Disposition of Property Plant Equipment       $ 47,000