Loans, Delinquent and Nonaccrual Loans by Past Due Status (Details)	12 Months Ended
	Jun. 30, 2016 USD ($) Loan	Jun. 30, 2015 USD ($)
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 5,765,000	$ 4,330,000
Current	525,525,000	446,425,000
Total loans	531,290,000	450,755,000
Loans on non-accrual	$ 3,326,000	4,608,000
Number of residential loans under process of foreclosure | Loan	9
Loans in the process of foreclosure	$ 1,500,000	1,200,000
Nonaccrual loans with recent history of delinquency greater than 90 days	1,900,000	2.6
Nonaccrual loans making payments pursuant to forbearance agreements	77,000
Accruing loans delinquent more than 90 days	77,000	84,000
30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	2,347,000	1,869,000
60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,873,000	336,000
90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,545,000	2,125,000
Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Loans in the process of foreclosure	867,000
Residential Real Estate [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	3,108,000	2,347,000
Current	231,884,000	224,301,000
Total loans	234,992,000	226,648,000
Loans on non-accrual	1,207,000	1,087,000
Residential Real Estate [Member] | Residential Real Estate [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,533,000	1,233,000
Residential Real Estate [Member] | Residential Real Estate [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	637,000	329,000
Residential Real Estate [Member] | Residential Real Estate [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	938,000	785,000
Residential Real Estate [Member] | Construction and Land [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	28,000
Current	5,575,000	3,593,000
Total loans	5,575,000	3,621,000
Loans on non-accrual	0	0
Residential Real Estate [Member] | Construction and Land [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	28,000
Residential Real Estate [Member] | Construction and Land [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Residential Real Estate [Member] | Construction and Land [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Residential Real Estate [Member] | Multi-family [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	47,000	0
Current	3,871,000	4,287,000
Total loans	3,918,000	4,287,000
Loans on non-accrual	0	0
Residential Real Estate [Member] | Multi-family [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	47,000	0
Residential Real Estate [Member] | Multi-family [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Residential Real Estate [Member] | Multi-family [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Commercial Real Estate [Member] | Real Estate Mortgage [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	1,707,000	1,472,000
Current	190,971,000	140,851,000
Total loans	192,678,000	142,323,000
Loans on non-accrual	1,899,000	2,964,000
Commercial Real Estate [Member] | Real Estate Mortgage [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	324,000	339,000
Commercial Real Estate [Member] | Real Estate Mortgage [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	793,000	1,000
Commercial Real Estate [Member] | Real Estate Mortgage [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	590,000	1,132,000
Commercial Real Estate [Member] | Construction [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Current	20,159,000	8,936,000
Total loans	20,159,000	8,936,000
Loans on non-accrual	0	0
Commercial Real Estate [Member] | Construction [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Commercial Real Estate [Member] | Construction [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Commercial Real Estate [Member] | Construction [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Consumer Loan [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	355,000	277,000
Current	20,538,000	20,742,000
Total loans	20,893,000	21,019,000
Loans on non-accrual	18,000	169,000
Consumer Loan [Member] | Home Equity [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	17,000	244,000
Consumer Loan [Member] | Home Equity [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	321,000	0
Consumer Loan [Member] | Home Equity [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	17,000	33,000
Consumer Loan [Member] | Consumer Installment [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	44,000	31,000
Current	4,306,000	4,092,000
Total loans	4,350,000	4,123,000
Loans on non-accrual	0	0
Consumer Loan [Member] | Consumer Installment [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	34,000	25,000
Consumer Loan [Member] | Consumer Installment [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	10,000	6,000
Consumer Loan [Member] | Consumer Installment [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	0	0
Commercial Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	504,000	175,000
Current	48,221,000	39,623,000
Total loans	48,725,000	39,798,000
Loans on non-accrual	202,000	388,000
Commercial Loans [Member] | 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	392,000	0
Commercial Loans [Member] | 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	112,000	0
Commercial Loans [Member] | 90 Days or More Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Total past due	$ 0	$ 175,000