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Note 11 - Acquisition (Details Textual)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
USD ($)
Oct. 01, 2024
USD ($)
shares
Sep. 30, 2025
USD ($)
Dec. 31, 2024
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2024
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2025
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Dec. 31, 2023
USD ($)
Business Combination, Bargain Purchase, Gain Recognized, Amount     $ 304   $ 0 $ 304 $ 0          
Business Combination, Acquisition-Related Cost, Expense     0   219 2,032 790          
Amortization of Intangible Assets     442   4 1,325 13          
Touchstone Bankshares, Inc [Member]                        
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares Issued Per Share Outstanding   0.55                    
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) | shares   2,673,640                    
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable $ 46,789 $ 46,789                    
Business Combination, Number of Branches Acquired   12                    
Business Combination, Bargain Purchase, Gain Recognized, Amount   $ 2,920 304         $ 3,224 $ 304      
Business Combination, Acquisition-Related Cost, Expense       $ 7,200   2,000            
Finite-Lived Intangible Assets, Net $ 13,660   13,660 14,985 104 13,660 104 $ 13,660 $ 13,660 $ 14,102 $ 108 $ 117
Amortization of Intangible Assets     $ 442   $ 4 $ 1,325 $ 13          
Touchstone Bankshares, Inc [Member] | Core Deposits [Member]                        
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)   7 years                    
Finite-Lived Intangible Assets, Net       $ 15,300