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SUBSEQUENT EVENTS (Details) - USD ($)
9 Months Ended
Nov. 03, 2022
Apr. 29, 2022
Sep. 30, 2022
Sep. 30, 2021
Subsequent events        
Distributions to Class B unitholders     $ 34,032 $ 59,170
Purchase and sale agreement | Royalty, mineral and overriding interests        
Subsequent events        
Total purchase price   $ 14,800,000    
Net proceeds realized   $ 6,400,000    
Subsequent Event | Common Units        
Subsequent events        
Cash distributions declared (in dollars per unit) $ 0.49      
Operating Company | Subsequent Event        
Subsequent events        
Cash distributions declared (in dollars per unit) 0.509479      
Distribution paid corresponding to tax payment (in dollars per unit) $ 0.019479