v3.26.1
Note 3 - Acquisitions for Common Units (Details Textual)
$ in Thousands
6 Months Ended
Jul. 31, 2026
USD ($)
a
shares
Aug. 29, 2025
USD ($)
a
shares
Sep. 30, 2024
USD ($)
a
shares
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Number Of Counties In Which Entity Operates       593    
Asset Acquisition Consideration Transferred Royalty and Mineral Revenue Received       $ 4,008 $ 2,028  
Oil and Gas, Full Cost Method, Property and Equipment, after Accumulated Depletion       210,817   $ 249,896
Multiple Unrelated Third Party [Member] | Mineral and Royalty Interests in Williston Basin in North Dakota [Member] | Subsequent Event [Member]            
Area of Real Estate Property (Acre) | a 3,100          
Number Of Counties In Which Entity Operates 5          
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable, Number of Shares (in shares) | shares 835,958          
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable $ 23,100          
Asset Acquisition Consideration Transferred Royalty and Mineral Revenue Received $ 3,600          
Multiple Unrelated Third Party [Member] | Mineral and Royalty Interest in Adams County, Colorado [Member]            
Area of Real Estate Property (Acre) | a   3,050        
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable, Number of Shares (in shares) | shares   915,694        
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable   $ 23,000        
Asset Acquisition Consideration Transferred Royalty and Mineral Revenue Received       $ 4,000    
Oil and Gas, Full Cost Method, Property and Equipment, after Accumulated Depletion           $ 19,700
Multiple Unrelated Third Party [Member] | Mineral and Royalty Interest in New Mexico and Texas [Member]            
Area of Real Estate Property (Acre) | a     14,225      
Number Of Counties In Which Entity Operates     14      
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable, Number of Shares (in shares) | shares     6,721,144      
Asset Acquisition, Consideration Transferred, Equity Interest Issued and Issuable     $ 202,600      
Asset Acquisition Consideration Transferred Royalty and Mineral Revenue Received         $ 2,000