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Investment Securities (Tables)
 3 Months Ended
Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
Schedule of gross unrealized or unrecognized gains and losses
   September 30, 2020 
(in thousands)  Amortized
cost		   Gross
unrealized/
unrecognized
gains		   Gross
unrealized/
unrecognized
losses		   Estimated
fair value		 
                 
Available-for-sale Securities                
Agency mortgage-backed: residential  $36   $–   $–   $36 
                     
Held-to-maturity Securities                    
Agency mortgage-backed: residential  $564   $21   $3   $582 
   June 30, 2020 
(in thousands)  Amortized
cost		   Gross
unrealized/
unrecognized
gains		   Gross
unrealized/
unrecognized
losses		   Estimated
fair value		 
                 
Available-for-sale Securities                
Agency bonds  $500   $3   $–   $503 
Agency mortgage-backed: residential   38    –    –    38 
   $538   $3   $–   $541 
                     
Held-to-maturity Securities                    
Agency mortgage-backed: residential  $598   $16   $3   $611