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Loans (Details 1) - USD ($) $ in Thousands		Jun. 30, 2018	Jun. 30, 2017		Jun. 30, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated		$ 3,409	$ 3,837
Loans individually evaluated for impairment, Acquired with deteriorated credit quality		1,138	1,676	[1]
Loans individually evaluated for impairment, Total allowance
Loans collectively evaluated for impairment, Total allowance		1,576	1,533
Allowance for loan losses		1,576	1,533		$ 1,515
Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Ending loans balance
Loans collectively evaluated for impairment, Ending loans balance		1,376	1,333
Allowance for loan losses		1,376	1,333
Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Ending loans balance		4,547	5,513
Loans collectively evaluated for impairment, Ending loans balance		269,642	254,518
Allowance for loan losses		274,189	260,031
Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Total allowance
Loans collectively evaluated for impairment, Total allowance		200	200
Allowance for loan losses		200	200
One-to four-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated		2,977	3,706
Loans individually evaluated for impairment, Acquired with deteriorated credit quality	[1]	1,138	1,676
Loans individually evaluated for impairment, Total allowance
Loans collectively evaluated for impairment, Total allowance		795	773
Allowance for loan losses		795	773		862
One-to four-family [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Ending loans balance
Loans collectively evaluated for impairment, Ending loans balance		795	773
One-to four-family [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Ending loans balance		4,115	5,382
Loans collectively evaluated for impairment, Ending loans balance		202,960	192,554
One-to four-family [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Total allowance
Loans collectively evaluated for impairment, Total allowance
Residential real estate, Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance		225	243
Allowance for loan losses		225	243		192
Residential real estate, Multi-family [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		225	243
Residential real estate, Multi-family [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		15,113	15,678
Residential real estate, Multi-family [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance
Residential real estate Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance		8	6
Allowance for loan losses		8	6		5
Residential real estate Construction [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		8	6
Residential real estate Construction [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		5,055	2,398
Residential real estate Construction [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance
Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance		1	4
Allowance for loan losses		1	4		2
Land [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		1	4
Land [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		677	1,304
Land [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance
Farm [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated		310
Loans individually evaluated for impairment, Acquired with deteriorated credit quality	[1]
Loans individually evaluated for impairment, Total allowance
Loans collectively evaluated for impairment, Total allowance		6	9
Allowance for loan losses		6	9		3
Farm [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Ending loans balance
Loans collectively evaluated for impairment, Ending loans balance		6	9
Farm [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Ending loans balance		310
Loans collectively evaluated for impairment, Ending loans balance		1,985	2,062
Farm [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance
Nonresidential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated		122	131
Loans individually evaluated for impairment, Acquired with deteriorated credit quality	[1]
Loans individually evaluated for impairment, Total allowance
Loans collectively evaluated for impairment, Total allowance		321	270
Nonresidential real estate [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Ending loans balance
Loans collectively evaluated for impairment, Ending loans balance		321	270
Nonresidential real estate [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Ending loans balance		122	131
Loans collectively evaluated for impairment, Ending loans balance		32,291	29,080
Nonresidential real estate [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Total allowance
Loans collectively evaluated for impairment, Total allowance
Commercial and industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Ending loans balance		3	6
Allowance for loan losses		3	6		18
Commercial and industrial [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Ending loans balance		3	6
Commercial and industrial [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Ending loans balance		1,917	2,540
Commercial and industrial [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Ending loans balance
Loans on deposits [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance		3	4
Allowance for loan losses		3	4		4
Loans on deposits [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		3	4
Loans on deposits [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		1,470	1,607
Loans on deposits [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance
Home equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance		13	17
Allowance for loan losses		13	17		11
Home equity [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		13	17
Home equity [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		7,603	6,853
Home equity [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance
Unsecured [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance		1	1
Allowance for loan losses		1	1		1
Unsecured [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		1	1
Unsecured [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		508	400
Unsecured [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance		200	200
Allowance for loan losses		200	200		$ 200
Unallocated [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance
Unallocated [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance
Unallocated [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance		200	200
Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance
Allowance for loan losses
Automobile [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance
Automobile [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance		63	42
Automobile [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance
[1] These loans were evaluated at acquisition date at their estimated fair value and there has been no subsequent deterioration since acquisition.

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The balance of financing receivables that were acquired with deteriorated credit quality.

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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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Amount of unpaid principal balance of impaired financing receivables with related allowance for credit losses and without related allowance for credit losses.

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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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