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Loans and Allowance for Loan Losses - Non Accruals 1 (Detail) - USD ($)
$ in Thousands
Sep. 30, 2021
Jun. 30, 2020
Real estate loans    
Total $ 1,095 $ 1,264
One- to four-family [Member]    
Real estate loans    
Total 1,052 1,218
Home equity lines of credit [Member]    
Real estate loans    
Total 0 0
Real Estate Loan [Member]    
Real estate loans    
Total 1,052 1,218
Commercial [Member]    
Real estate loans    
Total   0
Commercial [Member]    
Real estate loans    
Total $ 43 46
Consumer Loans [Member]    
Real estate loans    
Total   $ 0