Loans and Allowance for Loan Losses, Delinquent and/or Nonaccrual Loans by Past Due Status (Details)	9 Months Ended
	Mar. 31, 2022 USD ($) Loan	Jun. 30, 2021 USD ($) Loan
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	$ 1,155,399,000	$ 1,108,408,000
Loans on non-accrual	3,865,000	2,301,000
Loans in the process of foreclosure	727,000	260,000
Nonaccrual loans with recent history of delinquency greater than 90 days	2,500,000	1,200,000
Loans placed into nonaccrual status	2,600,000
Loan repayments	920,000
Charge-offs	134,000
Accruing loans delinquent more than 90 days	0	0
Total Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	14,921,000	7,352,000
30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	12,638,000	59,000
60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	902,000	6,179,000
90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	1,381,000	1,114,000
Current [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	1,140,478,000	1,101,056,000
Residential Real Estate [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Loans in the process of foreclosure	$ 625,000	$ 158,000
Number of loans in the process of foreclosure | Loan	5	2
Residential Real Estate [Member] | Residential Real Estate [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	$ 342,304,000	$ 325,167,000
Loans on non-accrual	2,955,000	1,324,000
Residential Real Estate [Member] | Residential Real Estate [Member] | Total Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	6,730,000	1,280,000
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 loans	5,349,000	0
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 loans	318,000	630,000
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 loans	1,063,000	650,000
Residential Real Estate [Member] | Residential Real Estate [Member] | Current [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	335,574,000	323,887,000
Residential Real Estate [Member] | Construction and Land [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	14,054,000	10,185,000
Loans on non-accrual	2,000	0
Residential Real Estate [Member] | Construction and Land [Member] | Total Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	2,000	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 loans	2,000	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 loans	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 loans	0	0
Residential Real Estate [Member] | Construction and Land [Member] | Current [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	14,052,000	10,185,000
Residential Real Estate [Member] | Multi-family [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	51,100,000	41,951,000
Loans on non-accrual	0	0
Residential Real Estate [Member] | Multi-family [Member] | Total Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	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 loans	0	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 loans	0	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 loans	0	0
Residential Real Estate [Member] | Multi-family [Member] | Current [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	51,100,000	41,951,000
Commercial Real Estate [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Loans in the process of foreclosure	$ 102,000	$ 102,000
Number of loans in the process of foreclosure | Loan	1	1
Commercial Real Estate [Member] | Real Estate [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	$ 535,603,000	$ 472,887,000
Loans on non-accrual	251,000	444,000
Commercial Real Estate [Member] | Real Estate [Member] | Total Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	5,666,000	5,389,000
Commercial Real Estate [Member] | Real Estate [Member] | 30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	5,543,000	0
Commercial Real Estate [Member] | Real Estate [Member] | 60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	0	5,266,000
Commercial Real Estate [Member] | Real Estate [Member] | 90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	123,000	123,000
Commercial Real Estate [Member] | Real Estate [Member] | Current [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	529,937,000	467,498,000
Commercial Real Estate [Member] | Construction [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	77,303,000	62,763,000
Loans on non-accrual	0	0
Commercial Real Estate [Member] | Construction [Member] | Total Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	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 loans	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 loans	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 loans	0	0
Commercial Real Estate [Member] | Construction [Member] | Current [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	77,303,000	62,763,000
Consumer Loan [Member] | Home Equity [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	18,395,000	18,285,000
Loans on non-accrual	190,000	237,000
Consumer Loan [Member] | Home Equity [Member] | Total Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	180,000	297,000
Consumer Loan [Member] | Home Equity [Member] | 30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	39,000	33,000
Consumer Loan [Member] | Home Equity [Member] | 60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	0	40,000
Consumer Loan [Member] | Home Equity [Member] | 90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	141,000	224,000
Consumer Loan [Member] | Home Equity [Member] | Current [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	18,215,000	17,988,000
Consumer Loan [Member] | Consumer Installment [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	4,365,000	4,942,000
Loans on non-accrual	3,000	0
Consumer Loan [Member] | Consumer Installment [Member] | Total Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	53,000	39,000
Consumer Loan [Member] | Consumer Installment [Member] | 30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	48,000	26,000
Consumer Loan [Member] | Consumer Installment [Member] | 60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	2,000	13,000
Consumer Loan [Member] | Consumer Installment [Member] | 90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	3,000	0
Consumer Loan [Member] | Consumer Installment [Member] | Current [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	4,312,000	4,903,000
Commercial Loans [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	112,275,000	172,228,000
Loans on non-accrual	464,000	296,000
Commercial Loans [Member] | Total Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	2,290,000	347,000
Commercial Loans [Member] | 30 to 59 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	1,657,000	0
Commercial Loans [Member] | 60 to 89 Days Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	582,000	230,000
Commercial Loans [Member] | 90 Days or More Past Due [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	51,000	117,000
Commercial Loans [Member] | Current [Member]
Delinquent and/or Nonaccrual Loans by Past Due Status [Abstract]
Total loans	$ 109,985,000	$ 171,881,000