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Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Summary of Significant Accounting Policies (Textual)
Amortization related mortgage servicing rights totaling	$ 13,000	$ 12,000
Servicing mortgage loans	10,800,000	11,700,000
Loan sold under FHLB Program	746,000
Average loan serviced	11,300,000
Servicing fees	$ 19,000	21,000
Fixed-rate mortgage loans with terms	30 years
Mortgage loans on real estate	95.00%
Loan-to-value, percentage	80.00%
Funding target attainment percentage	93.00%
Deferred compensation	$ 1,000	4,000
Liabilities totaled	45,000	61,000
Repayment of a loan	1,200,000	1,400,000
Expense for ESOP	$ 213,000	$ 188,000
Total shares surrendered plan totaled	84,961	103,636
Amounts contributed ESOP	$ 280,000	$ 280,000
Valuation adjustments	171,000	151,000
Fair value less costs to sell, carrying amount	182,000	353,000
Write-down	51,000	145,000
Deposits from related parties	$ 2,900,000	$ 2,700,000
Multi Family and Nonresidential Loans [Member]
Summary of Significant Accounting Policies (Textual)
Fixed-rate mortgage loans with terms	25 years
Mortgage loans on real estate alternate percentage	80.00%
Loans To Qualified Borrowers [Member]
Summary of Significant Accounting Policies (Textual)
Loan-to-value, percentage	90.00%
Loans Secured By Savings [Member]
Summary of Significant Accounting Policies (Textual)
Loan-to-value, percentage	90.00%
Construction Loans [Member]
Summary of Significant Accounting Policies (Textual)
Mortgage loans on real estate alternate percentage	80.00%
Employee Stock Ownership Plan [Member]
Summary of Significant Accounting Policies (Textual)
Total shares surrendered plan totaled	155,794	98,588
Pentegra DB Plan [Member]
Summary of Significant Accounting Policies (Textual)
Plan contributions		$ 153,200,000	$ 163,100,000
Plan contributions, percentage	5.00%	5.00%
Expense related plans totaling	$ 695,000	$ 558,000
Mortgage Servicing Rights [Member]
Summary of Significant Accounting Policies (Textual)
Fair value, total	$ 87,000	$ 94,000
First Mortgage [Member]
Summary of Significant Accounting Policies (Textual)
Mortgage loans on real estate alternate percentage	90.00%

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This is the result of the average balance during the period of total loans serviced.

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Percentage of borrowing capacity under a line of credit and secured by the borrower's residential property.

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The periodic amortization (in proportion to and over the period of estimated net servicing income or loss) of capitalized servicing rights, which contractually entitle the servicer to receive fees and ancillary revenues for performing billing, collection, disbursement and recordkeeping services in connection with a mortgage portfolio. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Shares contributed to the ESOP that have not yet been released, committed to be released, or allocated to participant accounts. Suspense shares generally collateralize ESOP debt.

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Interest and fee income from mortgage loans considered to be held-for-sale.

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Description of the contractual payment terms of the loan receivable including whether principal and interest is payable at a level or varying amount over the life of the loan, the amount of any balloon payment required at maturity, and any prepayment penalties.

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Percentage of contributions required of employer under collective bargaining arrangement to total contributions required under all collective bargaining arrangements for pension and other postretirement plan to which two or more unrelated employers contribute where assets contributed by one participating employer may be used to provide benefits to employees of other participating employers.

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Valuation adjustments made to other real estate not separately disclosed, including, but not limited to, real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. This excludes real estate assets taken in settlement of troubled loans through surrender or foreclosure.

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Amount, before accumulated depreciation, of real estate investments for entities with a substantial portion of business acquiring and holding investment real estate.

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