Loans and Allowance for Loan Losses, Loan Balances by Internal Credit Quality Indicator (Details) $ in Thousands	6 Months Ended
	Dec. 31, 2016 USD ($) Segment	Jun. 30, 2016 USD ($)
Financing Receivable, Recorded Investment [Line Items]
Number of segments within loan portfolio | Segment	4
Total gross loans	$ 600,882	$ 531,290
Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	593,735	524,661
Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	953	1,166
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	618	645
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	5,576	4,818
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	0
Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	$ 0	0
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan-to-value ratio	89.90%
Residential Real Estate [Member] | Residential Mortgage with Private Mortgage Insurance [Member]
Financing Receivable, Recorded Investment [Line Items]
Loan-to-value ratio	95.00%
Residential Real Estate [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	$ 238,431	234,992
Residential Real Estate [Member] | Residential Real Estate [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	235,628	232,321
Residential Real Estate [Member] | Residential Real Estate [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	755	757
Residential Real Estate [Member] | Residential Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	93	94
Residential Real Estate [Member] | Residential Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	1,955	1,820
Residential Real Estate [Member] | Construction and Land [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	4,980	5,575
Residential Real Estate [Member] | Construction and Land [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	4,980	5,575
Residential Real Estate [Member] | Construction and Land [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	0
Residential Real Estate [Member] | Construction and Land [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	0
Residential Real Estate [Member] | Construction and Land [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	0
Residential Real Estate [Member] | Multi-family [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	3,904	3,918
Residential Real Estate [Member] | Multi-family [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	3,810	3,820
Residential Real Estate [Member] | Multi-family [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	0
Residential Real Estate [Member] | Multi-family [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	0
Residential Real Estate [Member] | Multi-family [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	94	98
Commercial Real Estate [Member] | Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	246,306	192,678
Commercial Real Estate [Member] | Real Estate [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	243,664	190,293
Commercial Real Estate [Member] | Real Estate [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	100	52
Commercial Real Estate [Member] | Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	178	531
Commercial Real Estate [Member] | Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	2,364	1,802
Commercial Real Estate [Member] | Construction [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	25,651	20,159
Commercial Real Estate [Member] | Construction [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	25,651	20,159
Commercial Real Estate [Member] | Construction [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	0
Commercial Real Estate [Member] | Construction [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	0
Commercial Real Estate [Member] | Construction [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	0
Consumer Loan [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	20,660	20,893
Consumer Loan [Member] | Home Equity [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	20,469	20,555
Consumer Loan [Member] | Home Equity [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	321
Consumer Loan [Member] | Home Equity [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	12
Consumer Loan [Member] | Home Equity [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	191	5
Consumer Loan [Member] | Consumer Installment [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	4,714	4,350
Consumer Loan [Member] | Consumer Installment [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	4,688	4,340
Consumer Loan [Member] | Consumer Installment [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	26	10
Consumer Loan [Member] | Consumer Installment [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	0
Consumer Loan [Member] | Consumer Installment [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	0	0
Commercial Loans [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	56,236	48,725
Commercial Loans [Member] | Performing [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	54,845	47,598
Commercial Loans [Member] | Watch [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	72	26
Commercial Loans [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	347	8
Commercial Loans [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total gross loans	$ 972	$ 1,093