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Debt Securities - Narrative (Details)
9 Months Ended
Mar. 31, 2022
USD ($)
security
Mar. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
security
Debt Securities, Available-for-sale [Line Items]      
Estimated Fair Value $ 106,315,000   $ 156,459,000
Proceeds from sale of securities available for sale 0 $ 0  
Gross realized gain (loss) 0 $ 0  
Securities available for sale pledged as collateral market value $ 52,350,000   $ 53,897,000
Number of securities with unrealized losses | security 124   28
Accrued interest receivable for investment securities available for sale $ 353,000    
Collateral Pledged      
Debt Securities, Available-for-sale [Line Items]      
Estimated Fair Value $ 53,266,000   $ 52,603,000