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Note 15 - Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Related Party Transactions [Table Text Block]
Balance, January 1, 2019
   $
5,120,000
  
Disbursements
    
2,466,000
  
Amounts repaid
    
(361,000
 )
Balance, December 31, 2019
   $
7,225,000
  
Undisbursed commitments to related parties, December 31, 2019
   $
55,000