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Note 11 - Pledged Collateral Related to Securities Sold Under Repurchase Agreements (Tables)
6 Months Ended
Jun. 30, 2020
Notes Tables  
Schedule of Financial Instruments Owned and Pledged as Collateral [Table Text Block]
   

2020

   

2019

 

Securities sold under agreements to repurchase:

               

U.S. government treasuries

  $ 2,486     $ 3,528  

U.S. government agencies

    39,793       35,557  

U.S. government mortgage-backed securities

    14,495       19,614  
                 

Total pledged collateral

  $ 56,774     $ 58,699