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Note 17 - Acquisition (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 01, 2021
Jun. 30, 2021
Dec. 31, 2021
Jun. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
 [1]
Assets, Total   $ 1,024,593   $ 1,024,593   $ 950,932
Loans and Leases Receivable, Net Amount, Total   611,883   611,883   622,429
Deposits, Total   914,305   914,305   $ 842,461
The Bank of Fincastle [Member]            
Assets, Total   267,200   267,200    
Loans and Leases Receivable, Net Amount, Total   194,500   194,500    
Deposits, Total   236,300   236,300    
The Bank of Fincastle [Member]            
Business Combination, Acquisition Related Costs   $ 277   $ 682    
The Bank of Fincastle [Member] | Forecast [Member]            
Business Combination, Acquisition Related Costs     $ 3,500   $ 4,200  
The Bank of Fincastle [Member] | Subsequent Event [Member]            
Business Combination, Consideration Transferred, Total $ 33,800          
Payments to Acquire Businesses, Gross $ 6,800          
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares) 1,348,356          
[1] Derived from audited consolidated financial statements.