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Loans Receivable (Details) - USD ($)
 9 Months Ended 12 Months Ended
Mar. 31, 2021
Jun. 30, 2020
Loans Receivable (Details) [Line Items]    
Loans receivable, description One- to four-family loans in process of foreclosure totaled $649,000 and $694,000 at March 31, 2021 and June 30, 2020, respectively.  
Banks had granted deferrals $ 18,400,000  
Troubled debt restructuring, description One borrower who owed $859,000 at March 31, 2021, had been granted an additional extension and returned to normal payment status in April 2021. All other borrowers granted a deferral, composed of 100 loans totaling $17.5 million in principal had resumed regular payments at March 31, 2021.  
Loans classified as TDRs $ 1,900,000 $ 1,900,000
Loans classified as TDS by court action 143,000  
Net of a purchase credit discount $ 351,000 $ 351,000
Troubled Debt Restructuring [Member]    
Loans Receivable (Details) [Line Items]    
Bankruptcy proceedings, percentage 29.40%