Loans Held for Investment - Schedule of Allowance For Loan Losses and Recorded Investment in Gross Loans, by Portfolio Type (Details) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2021	Jun. 30, 2020
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 8,265	$ 7,076
(Recovery) provision for loan losses	(708)	1,119
Recoveries	32	72
Charge-offs	(2)	(2)
Allowance for loan losses, end of period	7,587	8,265
Individually evaluated for impairment	384	100
Collectively evaluated for impairment	7,203	8,165
Individually evaluated for impairment	8,039	3,406
Collectively evaluated for impairment	844,043	901,060
Total Loans Held for Investment, Gross	$ 852,082	$ 904,466
Allowance for loan losses as a percentage of gross loans held for investment	0.88%	0.91%
Mortgage loans, Single-family
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 2,622	$ 2,709
(Recovery) provision for loan losses	(653)	(156)
Recoveries	31	70
Charge-offs	0	(1)
Allowance for loan losses, end of period	2,000	2,622
Individually evaluated for impairment	384	96
Collectively evaluated for impairment	1,616	2,526
Individually evaluated for impairment	8,039	3,371
Collectively evaluated for impairment	260,233	295,439
Total Loans Held for Investment, Gross	$ 268,272	$ 298,810
Allowance for loan losses as a percentage of gross loans held for investment	0.75%	0.88%
Mortgage Loans, Multi Family
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 4,329	$ 3,219
(Recovery) provision for loan losses	156	1,110
Recoveries	0	0
Charge-offs	0	0
Allowance for loan losses, end of period	4,485	4,329
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	4,485	4,329
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	484,408	491,903
Total Loans Held for Investment, Gross	$ 484,408	$ 491,903
Allowance for loan losses as a percentage of gross loans held for investment	0.93%	0.88%
Mortgage loans, Commercial real estate
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 1,110	$ 1,050
(Recovery) provision for loan losses	(104)	60
Recoveries	0	0
Charge-offs	0	0
Allowance for loan losses, end of period	1,006	1,110
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	1,006	1,110
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	95,279	105,235
Total Loans Held for Investment, Gross	$ 95,279	$ 105,235
Allowance for loan losses as a percentage of gross loans held for investment	1.06%	1.05%
Construction
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 171	$ 61
(Recovery) provision for loan losses	(120)	110
Recoveries	0	0
Charge-offs	0	0
Allowance for loan losses, end of period	51	171
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	51	171
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	3,040	7,801
Total Loans Held for Investment, Gross	$ 3,040	$ 7,801
Allowance for loan losses as a percentage of gross loans held for investment	1.68%	2.19%
Mortgage Loans Other
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 3	$ 3
(Recovery) provision for loan losses	0	0
Recoveries	0	0
Charge-offs	0	0
Allowance for loan losses, end of period	3	3
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	3	3
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	139	143
Total Loans Held for Investment, Gross	$ 139	$ 143
Allowance for loan losses as a percentage of gross loans held for investment	2.16%	2.10%
Commercial business loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 24	$ 26
(Recovery) provision for loan losses	12	(2)
Recoveries	0	0
Charge-offs	0	0
Allowance for loan losses, end of period	36	24
Individually evaluated for impairment	0	4
Collectively evaluated for impairment	36	20
Individually evaluated for impairment	0	35
Collectively evaluated for impairment	849	445
Total Loans Held for Investment, Gross	$ 849	$ 480
Allowance for loan losses as a percentage of gross loans held for investment	4.24%	5.00%
Consumer loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance at beginning of period	$ 6	$ 8
(Recovery) provision for loan losses	1	(3)
Recoveries	1	2
Charge-offs	(2)	(1)
Allowance for loan losses, end of period	6	6
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	6	6
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	95	94
Total Loans Held for Investment, Gross	$ 95	$ 94
Allowance for loan losses as a percentage of gross loans held for investment	6.32%	6.38%

Represents amount of allowance for loan losses as a percentage of gross loans-held for investment.

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Loans Held For Investment, Gross

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Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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The balance of financing receivables that were collectively evaluated for impairment.

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- Definition

Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount of expense related to estimated loss from loan and lease transactions.

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