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Note 3 - Interest Bearing Time Deposits in Banks (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Interest Bearing Time Deposits in Banks [Table Text Block]
   
Weighted
   
 
 
 
Years ending December 31:
 
Average Rate
   
Amount
 
201
9
 
0.48
%     $
100
 
20
21
 
1.84
       
2,490
 
202
2
 
2.32
       
1,485
 
                 
Total
 
1.98
%     $
4,075