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Note 1 - Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2017
Notes Tables  
Estimated Useful Lives and Methods of Depreciation [Table Text Block]
Description
 
Life
 
in
 
Years
 
Method
             
Banking
 Premises
 
15
-
40
 
Straight-Line
 and Accelerated
Furniture
 and Equipment
 
 
5
-
10
 
Straight-Line
 and Accelerated