v3.26.1
Note 3 - Oil and Gas Investments (Details Textual)
$ in Millions
2 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended 106 Months Ended
Aug. 31, 2018
USD ($)
Feb. 01, 2018
USD ($)
Nov. 30, 2025
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2026
USD ($)
Sep. 30, 2026
USD ($)
Jun. 30, 2026
Wells Participating to be Drilled               263
Oil and Gas, Development Well Drilled, Net Productive, Number               249
Gas and Oil Area Developed Net 1       5.00%        
Oil and Gas, Cost Incurred, Development Cost       $ 3.2 $ 1.4      
The 12 New Wells Elected to Participate in October and November 2025 [Member]                
Wells Participating to be Drilled     12          
Oil and Gas, Cost Incurred, Development Cost           $ 4.8    
The 12 New Wells Elected to Participate in October and November 2025 [Member] | Forecast [Member]                
Oil and Gas, Cost Incurred, Development Cost             $ 9.0  
Oil [Member]                
Oil and Gas, Productive Well, Gross, Number       450   450   450
Bakken Asset Acquisition [Member]                
Asset Acquisition, Consideration Transferred $ 81.3 $ 90.5