Note 9 - Loans and Related Allowance for Loan Losses - Schedule of Loan Portfolio By Aging Categories (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Jun. 30, 2021
Total Loans	$ 78,828	$ 80,971
90 Days + Past Due Non-accrual	0	0
Deferred loan costs	227	278
Allowance for loan losses	(529)	(565)
Net loans receivable (allowance for loan losses of $529 and $565)	78,526	80,684
Financial Asset, Not Past Due [Member]
Total Loans	78,828	80,971
Financial Asset, 30 to 59 Days Past Due [Member]
Total Loans	0	0
Financial Asset, 60 to 89 Days Past Due [Member]
Total Loans	0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total Loans	0	0
Financial Asset, Past Due [Member]
Total Loans	0	0
First Mortgage Loans One to Four Family Dwellings [Member]
Total Loans	63,431	67,410
90 Days + Past Due Non-accrual	0	0
First Mortgage Loans One to Four Family Dwellings [Member] | Financial Asset, Not Past Due [Member]
Total Loans	63,431	67,410
First Mortgage Loans One to Four Family Dwellings [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total Loans	0	0
First Mortgage Loans One to Four Family Dwellings [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total Loans	0
First Mortgage Loans One to Four Family Dwellings [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total Loans	0	0
First Mortgage Loans One to Four Family Dwellings [Member] | Financial Asset, Past Due [Member]
Total Loans	0	0
First Mortgage Loans Construction [Member]
Total Loans	3,151	2,612
90 Days + Past Due Non-accrual	0	0
First Mortgage Loans Construction [Member] | Financial Asset, Not Past Due [Member]
Total Loans	3,151	2,612
First Mortgage Loans Construction [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total Loans	0	0
First Mortgage Loans Construction [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total Loans	0
First Mortgage Loans Construction [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total Loans	0	0
First Mortgage Loans Construction [Member] | Financial Asset, Past Due [Member]
Total Loans	0	0
First Mortgage Loans Land Acquisition and Development [Member]
Total Loans	670	666
90 Days + Past Due Non-accrual	0	0
First Mortgage Loans Land Acquisition and Development [Member] | Financial Asset, Not Past Due [Member]
Total Loans	670	666
First Mortgage Loans Land Acquisition and Development [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total Loans	0	0
First Mortgage Loans Land Acquisition and Development [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total Loans	0
First Mortgage Loans Land Acquisition and Development [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total Loans	0	0
First Mortgage Loans Land Acquisition and Development [Member] | Financial Asset, Past Due [Member]
Total Loans	0	0
First Mortgage Loans Multifamily Dwellings [Member]
Total Loans	3,334	3,469
90 Days + Past Due Non-accrual	0	0
First Mortgage Loans Multifamily Dwellings [Member] | Financial Asset, Not Past Due [Member]
Total Loans	3,334	3,469
First Mortgage Loans Multifamily Dwellings [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total Loans	0	0
First Mortgage Loans Multifamily Dwellings [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total Loans	0
First Mortgage Loans Multifamily Dwellings [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total Loans	0	0
First Mortgage Loans Multifamily Dwellings [Member] | Financial Asset, Past Due [Member]
Total Loans	0	0
First Mortgage Loans Commercial [Member]
Total Loans	4,929	3,939
90 Days + Past Due Non-accrual	0	0
First Mortgage Loans Commercial [Member] | Financial Asset, Not Past Due [Member]
Total Loans	4,929	3,939
First Mortgage Loans Commercial [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total Loans	0	0
First Mortgage Loans Commercial [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total Loans	0
First Mortgage Loans Commercial [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total Loans	0	0
First Mortgage Loans Commercial [Member] | Financial Asset, Past Due [Member]
Total Loans	0	0
Consumer Loans Home Equity [Member]
Total Loans	1,991	1,340
90 Days + Past Due Non-accrual	0	0
Consumer Loans Home Equity [Member] | Financial Asset, Not Past Due [Member]
Total Loans	1,991	1,340
Consumer Loans Home Equity [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total Loans	0	0
Consumer Loans Home Equity [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total Loans	0
Consumer Loans Home Equity [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total Loans	0	0
Consumer Loans Home Equity [Member] | Financial Asset, Past Due [Member]
Total Loans	0	0
Home Equity Line of Credit [Member]
Total Loans	1,301	1,508
90 Days + Past Due Non-accrual	0	0
Home Equity Line of Credit [Member] | Financial Asset, Not Past Due [Member]
Total Loans	1,301	1,508
Home Equity Line of Credit [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total Loans	0	0
Home Equity Line of Credit [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total Loans	0
Home Equity Line of Credit [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total Loans	0	0
Home Equity Line of Credit [Member] | Financial Asset, Past Due [Member]
Total Loans	0	0
Consumer Loans, Other [Member]
Total Loans	21	27
90 Days + Past Due Non-accrual	0	0
Consumer Loans, Other [Member] | Financial Asset, Not Past Due [Member]
Total Loans	21	27
Consumer Loans, Other [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total Loans	0	0
Consumer Loans, Other [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total Loans	0
Consumer Loans, Other [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total Loans	0	0
Consumer Loans, Other [Member] | Financial Asset, Past Due [Member]
Total Loans	0	0
Commercial Loans [Member]
Total Loans	0	0
90 Days + Past Due Non-accrual	0	0
Commercial Loans [Member] | Financial Asset, Not Past Due [Member]
Total Loans	0	0
Commercial Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member]
Total Loans	0	0
Commercial Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member]
Total Loans	0
Commercial Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Total Loans	0	0
Commercial Loans [Member] | Financial Asset, Past Due [Member]
Total Loans	$ 0	$ 0