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Loans Receivable (Details) - Schedule of allowance for loan losses and the recorded investment in loans by portfolio - USD ($) $ in Thousands	Mar. 31, 2021	Jun. 30, 2020
Residential real estate:
Unpaid principal balance and recorded investment	$ 300,812	$ 287,375
Ending allowance attributed to loans	1,422	1,288
Unallocated allowance	200	200
Total allowance	1,622	1,488
Loans individually evaluated for impairment [Member]
Residential real estate:
Loans individually evaluated	5,498	5,686
Loans acquired with deteriorated credit quality	667	751
Unpaid principal balance and recorded investment	6,165	6,437
Ending allowance attributed to loans
Unallocated allowance
Total allowance
Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment	294,647	280,938
Ending allowance attributed to loans	1,422	1,288
Unallocated allowance	200	200
Total allowance	1,622	1,488
One-to four-family [Member] | Loans individually evaluated for impairment [Member]
Residential real estate:
Loans individually evaluated	3,903	3,983
Loans acquired with deteriorated credit quality	667	751
Unpaid principal balance and recorded investment	4,570	4,734
Ending allowance attributed to loans
Unallocated allowance
Total allowance
One-to four-family [Member] | Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment	218,308	217,755
Ending allowance attributed to loans	645	671
Unallocated allowance
Total allowance	645	671
Multi-family [Member] | Loans individually evaluated for impairment [Member]
Residential real estate:
Loans individually evaluated	652	671
Loans acquired with deteriorated credit quality
Unpaid principal balance and recorded investment	652	671
Ending allowance attributed to loans
Unallocated allowance
Total allowance
Multi-family [Member] | Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment	19,121	11,702
Ending allowance attributed to loans	280	184
Unallocated allowance
Total allowance	280	184
Farm [Member] | Loans individually evaluated for impairment [Member]
Residential real estate:
Loans individually evaluated	290	309
Loans acquired with deteriorated credit quality
Unpaid principal balance and recorded investment	290	309
Ending allowance attributed to loans
Unallocated allowance
Total allowance
Farm [Member] | Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment	1,927	2,045
Ending allowance attributed to loans	4	4
Unallocated allowance
Total allowance	4	4
Nonresidential real estate [Member] | Loans individually evaluated for impairment [Member]
Residential real estate:
Loans individually evaluated	636	660
Loans acquired with deteriorated credit quality
Unpaid principal balance and recorded investment	636	660
Ending allowance attributed to loans
Unallocated allowance
Total allowance
Nonresidential real estate [Member] | Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment	37,248	32,843
Ending allowance attributed to loans	466	405
Unallocated allowance
Total allowance	466	405
Unsecured [Member] | Loans individually evaluated for impairment [Member]
Residential real estate:
Loans individually evaluated	17
Loans acquired with deteriorated credit quality
Unpaid principal balance and recorded investment	17
Ending allowance attributed to loans
Unallocated allowance
Total allowance
Unsecured [Member] | Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment	511	675
Ending allowance attributed to loans	1	1
Unallocated allowance
Total allowance	1	1
Construction [Member] | Loans individually evaluated for impairment [Member]
Residential real estate:
Loans individually evaluated		63
Loans acquired with deteriorated credit quality
Unpaid principal balance and recorded investment		63
Ending allowance attributed to loans
Unallocated allowance
Total allowance
Construction [Member] | Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment	5,959	3,982
Ending allowance attributed to loans	9	6
Unallocated allowance
Total allowance	9	6
Land [Member] | Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment	1,286	765
Ending allowance attributed to loans	2	1
Unallocated allowance
Total allowance	2	1
Commercial nonmortgage [Member] | Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment	2,082	2,214
Ending allowance attributed to loans	3	3
Unallocated allowance
Total allowance	3	3
Loans on deposits [Member] | Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment	1,126	1,245
Ending allowance attributed to loans	2	2
Unallocated allowance
Total allowance	2	2
Home equity [Member] | Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment	7,004	7,645
Ending allowance attributed to loans	10	11
Unallocated allowance
Total allowance	10	11
Automobile [Member] | Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment	75	67
Ending allowance attributed to loans
Unallocated allowance
Total allowance
Unallocated [Member] | Loans collectively evaluated for impairment [Member]
Residential real estate:
Unpaid principal balance and recorded investment
Ending allowance attributed to loans
Unallocated allowance	200	200
Total allowance	$ 200	$ 200

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