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Investment Securities (Tables)
 6 Months Ended
Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]  
Schedule of gross unrealized or unrecognized gains and losses
   December 31, 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  $534   $20   $4   $550 
   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