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Loans and Allowance for Loan Losses - Non Accruals 1 (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Jun. 30, 2019
Real estate loans    
Total $ 1,330 $ 1,505
One- to four-family [Member]    
Real estate loans    
Total 1,256 1,475
Home equity lines of credit [Member]    
Real estate loans    
Total 15 22
Real Estate Loan [Member]    
Real estate loans    
Total 1,271 1,503
Commercial [Member]    
Real estate loans    
Total   6
Commercial [Member]    
Real estate loans    
Total $ 59  
Consumer Loans [Member]    
Real estate loans    
Total   $ 2