v3.26.1
Note 3 - Securities (Details Textual)
$ in Thousands
6 Months Ended
Jun. 30, 2026
USD ($)
Securities
Dec. 31, 2025
USD ($)
Marketable Securities [Line Items]    
Deferred Tax Asset, Debt Securities, Available-for-Sale, Unrealized Loss $ 10,366 $ 10,889
Debt Securities, Available-for-Sale, Unrealized Loss Position, Number of Positions | Securities 410  
Debt Securities, Available-for-Sale, Unrealized Loss Position $ 550,642  
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss $ 3,249 $ 3,177
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] Securities available-for-sale, fair values Securities available-for-sale, fair values
Debt Securities, Realized Gain (Loss) $ 6,549  
National Bank of Blacksburg [Member] | Federal Home Loan Bank of Atlanta [Member]    
Marketable Securities [Line Items]    
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged 504,596  
Restricted Stock [Member]    
Marketable Securities [Line Items]    
Restricted Investments $ 1,872 $ 1,848