Note 9 - Loans and Related Allowance for Loan Losses - Schedule of Loans By Internal Classification (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Jun. 30, 2021
First Mortgage Loans Construction [Member]
Loans receivable	$ 1,914	$ 2,612
First Mortgage Loans Land Acquisition and Development [Member]
Loans receivable	516	666
First Mortgage Loans Multifamily Dwellings [Member]
Loans receivable	3,342	3,469
First Mortgage Loans Commercial [Member]
Loans receivable	4,722	3,939
Commercial Loans [Member]
Loans receivable	30	0
Pass [Member] | First Mortgage Loans Construction [Member]
Loans receivable	1,914	2,612
Pass [Member] | First Mortgage Loans Land Acquisition and Development [Member]
Loans receivable	516	666
Pass [Member] | First Mortgage Loans Multifamily Dwellings [Member]
Loans receivable	3,342	3,469
Pass [Member] | First Mortgage Loans Commercial [Member]
Loans receivable	4,722	3,939
Pass [Member] | Commercial Loans [Member]
Loans receivable	30	0
Special Mention [Member] | First Mortgage Loans Construction [Member]
Loans receivable	0	0
Special Mention [Member] | First Mortgage Loans Land Acquisition and Development [Member]
Loans receivable	0	0
Special Mention [Member] | First Mortgage Loans Multifamily Dwellings [Member]
Loans receivable	0	0
Special Mention [Member] | First Mortgage Loans Commercial [Member]
Loans receivable	0	0
Special Mention [Member] | Commercial Loans [Member]
Loans receivable	0	0
Substandard [Member] | First Mortgage Loans Construction [Member]
Loans receivable	0	0
Substandard [Member] | First Mortgage Loans Land Acquisition and Development [Member]
Loans receivable	0	0
Substandard [Member] | First Mortgage Loans Multifamily Dwellings [Member]
Loans receivable	0	0
Substandard [Member] | First Mortgage Loans Commercial [Member]
Loans receivable	0	0
Substandard [Member] | Commercial Loans [Member]
Loans receivable	0	0
Doubtful [Member] | First Mortgage Loans Construction [Member]
Loans receivable	0	0
Doubtful [Member] | First Mortgage Loans Land Acquisition and Development [Member]
Loans receivable	0	0
Doubtful [Member] | First Mortgage Loans Multifamily Dwellings [Member]
Loans receivable	0	0
Doubtful [Member] | First Mortgage Loans Commercial [Member]
Loans receivable	0	0
Doubtful [Member] | Commercial Loans [Member]
Loans receivable	$ 0	$ 0