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Note 6 - Short-term Borrowings (Tables)
12 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Short-term Debt [Table Text Block]
   
201
8
   
201
7
 
Balance at June 30
  $
13,367
    $
23,986
 
Average balance during the year
   
24,422
     
21,053
 
Maximum month-end balance
   
28,621
     
28,073
 
Average interest rate during the year
   
0.98
%
   
0.43
%
Weighted average rate, June 30
   
1.02
%
   
0.82
%
Schedule of Repurchase Agreements [Table Text Block]
   
Overnight and Continuous
 
   
201
8
   
201
7
 
U.S. government-sponsored entities and agencies pledged
  $
    $
2,015
 
Residential mortgage-backed securities pledged
   
5,294
     
20,923
 
Collateralized mortgage obligations pledged
   
     
2,355
 
Total pledged
  $
5,294
    $
25,293
 
Repurchase agreements
  $
4,486
    $
23,986