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Note 4 - Mortgage Banking (Tables)
 12 Months Ended
Dec. 31, 2021
Notes Tables  
Schedule of Activity in Secondary Market Loans [Table Text Block]

(Dollars in thousands)

                        
   

2021

    

2020

    

2019

  

Loans originated for resale, net of principal payments

   $ 197,387     $ 326,286     $ 63,920  

Proceeds from loan sales

     205,398       325,306       62,763  

Net gains on sales of loans held for sale

     6,776       11,313       1,951  

Loan servicing fees, net of amortization

     (163 )     (129 )     82  
Servicing Asset at Amortized Cost [Table Text Block]

(Dollars in thousands)

                        
   

2021

    

2020

    

2019

  

Balance, beginning of year

   $ 3,967     $ 2,131     $ 1,049  

Capitalized

     1,961       3,554       822  

Amortization

     (1,635 )     (1,344 )     (453 )

Market valuation allowance change

     374       (374 )     -  

Acquired from merger with County Bank Corp.

     -       -       713  

Balance, end of year

   $ 4,667     $ 3,967     $ 2,131