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Investment Securities - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Jun. 30, 2021
Debt Securities, Available-for-sale [Line Items]          
Investments with an unrealized loss position $ 1,778,000   $ 1,778,000   $ 810,000
Unrealized holding losses, 12 months or more 367,000   367,000   0
Unrealized Holding Losses Total, Unrealized Losses 1,778,000   1,778,000   810,000
Impairment loss 0 $ 0 0 $ 0  
U.S. government sponsored enterprise MBS          
Debt Securities, Available-for-sale [Line Items]          
Principal payments from investment securities available for sale 15,500,000 12,400,000 32,500,000 21,800,000  
Payments to acquire Mortgage Backed Securities (MBS) categorized as Held-to-maturity 15,000,000.0 $ 21,500,000 15,000,000.0 $ 106,400,000  
Investments with an unrealized loss position 1,778,000   1,778,000   810,000
Unrealized holding losses, 12 months or more $ 367,000   $ 367,000    
U.S. SBA securities          
Debt Securities, Available-for-sale [Line Items]          
Investments with an unrealized loss position         0
Unrealized holding losses, 12 months or more         $ 0