Loans, Delinquent and Nonaccrual Loans by Past Due Status (Details) $ in Thousands	Jun. 30, 2019 USD ($) Loan	Jun. 30, 2018 USD ($) Loan
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	$ 7,340	$ 7,042
Current	790,765	708,599
Total loans	798,105	715,641
Loans on non-accrual	3,638	3,517
Loans in the process of foreclosure	1,600	1,900
Nonaccrual loans with recent history of delinquency greater than 90 days	1,800	1,300
Nonaccrual loans making payments pursuant to forbearance agreements	175
Accruing loans delinquent more than 90 days	0	62
30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	2,903	3,476
60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	2,607	1,298
90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	$ 1,830	$ 2,268
Residential Real Estate [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Number of loans in the process of foreclosure | Loan	12	11
Loans in the process of foreclosure	$ 1,500	$ 1,200
Residential Real Estate [Member] | Residential Real Estate [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	4,399	3,286
Current	263,403	252,562
Total loans	267,802	255,848
Loans on non-accrual	2,474	1,778
Residential Real Estate [Member] | Residential Real Estate [Member] | 30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	2,144	1,617
Residential Real Estate [Member] | Residential Real Estate [Member] | 60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	870	458
Residential Real Estate [Member] | Residential Real Estate [Member] | 90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	1,385	1,211
Residential Real Estate [Member] | Construction and Land [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	0	0
Current	7,462	9,951
Total loans	7,462	9,951
Loans on non-accrual	0	0
Residential Real Estate [Member] | Construction and Land [Member] | 30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	0	0
Residential Real Estate [Member] | Construction and Land [Member] | 60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	0	0
Residential Real Estate [Member] | Construction and Land [Member] | 90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	0	0
Residential Real Estate [Member] | Multi-family [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	138	0
Current	24,454	14,961
Total loans	24,592	14,961
Loans on non-accrual	0	0
Residential Real Estate [Member] | Multi-family [Member] | 30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	1	0
Residential Real Estate [Member] | Multi-family [Member] | 60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	137	0
Residential Real Estate [Member] | Multi-family [Member] | 90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	0	0
Commercial Real Estate [Member] | Real Estate Mortgage [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	1,490	2,623
Current	328,178	281,312
Total loans	329,668	283,935
Loans on non-accrual	598	1,147
Commercial Real Estate [Member] | Real Estate Mortgage [Member] | 30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	280	1,568
Commercial Real Estate [Member] | Real Estate Mortgage [Member] | 60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	1,108	487
Commercial Real Estate [Member] | Real Estate Mortgage [Member] | 90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	102	568
Commercial Real Estate [Member] | Construction [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	0	0
Current	36,361	39,366
Total loans	36,361	39,366
Loans on non-accrual	0	0
Commercial Real Estate [Member] | Construction [Member] | 30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	0	0
Commercial Real Estate [Member] | Construction [Member] | 60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	0	0
Commercial Real Estate [Member] | Construction [Member] | 90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	0	0
Consumer Loan [Member] | Home Equity [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	461	465
Current	22,724	21,454
Total loans	23,185	21,919
Loans on non-accrual	452	298
Consumer Loan [Member] | Home Equity [Member] | 30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	16	38
Consumer Loan [Member] | Home Equity [Member] | 60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	136	128
Consumer Loan [Member] | Home Equity [Member] | 90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	309	299
Consumer Loan [Member] | Consumer Installment [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	52	41
Current	5,429	4,976
Total loans	5,481	5,017
Loans on non-accrual	6	18
Consumer Loan [Member] | Consumer Installment [Member] | 30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	32	3
Consumer Loan [Member] | Consumer Installment [Member] | 60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	14	30
Consumer Loan [Member] | Consumer Installment [Member] | 90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	6	8
Commercial Loans [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	800	627
Current	102,754	84,017
Total loans	103,554	84,644
Loans on non-accrual	108	276
Commercial Loans [Member] | 30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	430	250
Commercial Loans [Member] | 60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	342	195
Commercial Loans [Member] | 90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total past due	$ 28	$ 182