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Loans Receivable (Details 2) - USD ($) $ in Thousands	Dec. 31, 2017	Jun. 30, 2017
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated	$ 3,527	$ 3,837
Loans individually evaluated for impairment, Acquired with deteriorated credit quality	1,318	1,676
Loans individually evaluated for impairment, Ending loans balance	4,845	5,513
Loans individually evaluated for impairment, Total allowance
Loans collectively evaluated for impairment, Total allowance	1,531	1,533
Loans collectively evaluated for impairment, Total	1,531	1,533
Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	260,709	254,518
Loans collectively evaluated for impairment, Total	265,554	260,031
Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated
Loans collectively evaluated for impairment, Ending loans balance	1,331	1,333
Loans collectively evaluated for impairment, Total	1,331	1,333
Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated
Loans collectively evaluated for impairment, Ending loans balance	200	200
Loans collectively evaluated for impairment, Total	200	200
One- to four-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated	2,864	3,706
Loans individually evaluated for impairment, Acquired with deteriorated credit quality	1,318	1,676
Loans individually evaluated for impairment, Ending loans balance	4,182	5,382
Loans individually evaluated for impairment, Total allowance
Loans collectively evaluated for impairment, Total allowance	739	773
One- to four-family [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	195,362	192,554
One- to four-family [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated
Loans collectively evaluated for impairment, Ending loans balance	739	773
One- to four-family [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated
Loans collectively evaluated for impairment, Ending loans balance
Loans collectively evaluated for impairment, Total allowance
Multi-family [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance	244	243
Multi-family [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	15,247	15,678
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	244	243
Multi-family [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance
Construction [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance	14	6
Construction [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	5,683	2,398
Construction [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	14	6
Construction [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance
Land [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance	2	4
Land [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	869	1,304
Land [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	2	4
Land [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance
Farm [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated	538
Loans individually evaluated for impairment, Acquired with deteriorated credit quality
Loans individually evaluated for impairment, Ending loans balance	538
Loans collectively evaluated for impairment, Total allowance	10	9
Farm [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	1,847	2,062
Farm [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	10	9
Farm [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance
Nonresidential real estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated	125	131
Loans individually evaluated for impairment, Acquired with deteriorated credit quality
Loans individually evaluated for impairment, Ending loans balance	125	131
Loans collectively evaluated for impairment, Total allowance	293	270
Nonresidential real estate [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	29,928	29,080
Nonresidential real estate [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated
Loans collectively evaluated for impairment, Ending loans balance	293	270
Nonresidential real estate [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans individually evaluated for impairment, Individually evaluated
Loans collectively evaluated for impairment, Ending loans balance
Commercial non-mortgage [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance	6	6
Commercial non-mortgage [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	2,466	2,540
Commercial non-mortgage [Member] | Ending allowance attributed to loans [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	6	6
Commercial non-mortgage [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively 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	4	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	1,634	1,607
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	4	4
Loans on deposits [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance
Home equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance	18	17
Home equity [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	7,110	6,853
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	18	17
Home equity [Member] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance
Unsecured [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance	1	1
Unsecured [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	534	400
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] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance
Unallocated [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance	200	200
Unallocated [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance
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] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	200	200
Automobile [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Total allowance
Automobile [Member] | Ending loans balance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance	29	42
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] | Unallocated allowance [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Loans collectively evaluated for impairment, Ending loans balance

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- Definition

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

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524

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+ References

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-Publisher FASB
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-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (h)
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (a)(4)
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