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Loans Receivable (Details) - USD ($)
 6 Months Ended 12 Months Ended
Dec. 31, 2020
Jun. 30, 2020
Loans Receivable (Details) [Line Items]    
Loans receivable, description One- to four-family loans in process of foreclosure totaled $790,000 and $694,000 at December 31, 2020 and June 30, 2020, respectively.  
Banks had granted deferrals $ 18,400,000  
Troubled debt restructuring, description Of those, five loans totaling $293,000 had not yet completed the initial 3-month deferral period at December 31, 2020. One borrower who owes $859,000 had been granted an additional extension. All other borrowers granted a deferral, composed of 95 loans totaling $17.2 million in principal had resumed regular payments.  
Loans classified as TDRs $ 1,900,000 $ 1,900,000
Loans classified as TDS by court action 144,000  
Net of a purchase credit discount $ 351,000 $ 351,000
Troubled Debt Restructuring [Member]    
Loans Receivable (Details) [Line Items]    
Bankruptcy proceedings, percentage 29.60%