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Loans and Allowance for Loan Losses - Non Accruals (Detail) - USD ($)
$ in Thousands
Jun. 30, 2020
Jun. 30, 2019
Mortgages on real estate:    
Total $ 405 $ 541
One- to four-family [Member]    
Mortgages on real estate:    
Total 81 414
Real Estate Loans Home Equity Lines Of Credit [Member]    
Mortgages on real estate:    
Total 15 20
Consumer Loans [Member]    
Mortgages on real estate:    
Total 5 29
Commercial [Member]    
Mortgages on real estate:    
Total   18
Commercial Business Loans [Member]    
Mortgages on real estate:    
Total $ 304 $ 60