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Investment Securities (Tables)
 9 Months Ended
Mar. 31, 2021
Investments, Debt and Equity Securities [Abstract]  
Schedule of gross unrealized or unrecognized gains and losses
   March 31, 2021 
(in thousands)  Amortized cost   Gross unrealized/ unrecognized
gains		   Gross unrealized/ unrecognized
losses		   Estimated fair value 
Available-for-sale Securities                
Agency mortgage-backed: residential  $33   $–   $      –   $33 
                     
Held-to-maturity Securities                    
Agency mortgage-backed: residential  $491   $20   $3   $508 
   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