v3.26.3
Note 1 - Organization and Summary of Significant Accounting Policies (Details Textual)
3 Months Ended 9 Months Ended
Oct. 31, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Investment, Proportional Amortization Method, Elected, Amount   $ 5,376,000   $ 5,376,000   $ 5,963,000
Investment Program, Proportional Amortization Method, Elected, Commitment   $ 166,000   $ 166,000    
Number of Stores   30   30    
Goodwill, Impairment Loss $ 0          
Number of Operating Segments       1    
Number of Reportable Segments       1    
Investment, Proportional Amortization Method, Elected, Statement of Financial Position [Extensible Enumeration]   Other Assets   Other Assets   Other Assets
Commodity Sales [Member]            
Revenue from Contract with Customer, Including Assessed Tax   $ 4,615,000 $ 2,500,000 $ 7,985,000 $ 7,612,000  
Gross Profit   0 0 0 0  
Contract with Customer, Liability   19,425,000   19,425,000   $ 23,549,000
Cost of Product and Service Sold   $ 4,615,000 $ 2,500,000 $ 7,985,000 $ 7,612,000  
Opportunity Bank of Montana [Member]            
Subsidiary, Ownership Percentage, Parent   100.00%   100.00%    
Eagle Bancorp Statutory Trust I [Member]            
Subsidiary, Ownership Percentage, Parent   100.00%   100.00%