Note 4 - Loans - Recorded Investment by Risk Category (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Jun. 30, 2022
Pass [Member]
Financing Receivable, Net	$ 425,783	$ 414,046
Special Mention [Member]
Financing Receivable, Net	2,717	2,909
Substandard [Member]
Financing Receivable, Net	5,345	4,889
Doubtful [Member]
Financing Receivable, Net	47	431
Not Rated [Member]
Financing Receivable, Net	205,020	190,782
Commercial Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Net	90,618	86,265
Commercial Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Net	309	350
Commercial Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Net	480	178
Commercial Portfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Net	0	276
Commercial Portfolio Segment [Member] | Not Rated [Member]
Financing Receivable, Net	168	182
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction Loans [Member]
Financing Receivable, Net	15,018	15,138
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Net	292,023	283,877
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Construction Loans [Member]
Financing Receivable, Net	0	0
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Net	2,351	2,500
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Construction Loans [Member]
Financing Receivable, Net	0	0
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Net	4,758	4,711
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Construction Loans [Member]
Financing Receivable, Net	0	0
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Net	0	0
Commercial Real Estate Portfolio Segment [Member] | Not Rated [Member] | Construction Loans [Member]
Financing Receivable, Net	0	0
Commercial Real Estate Portfolio Segment [Member] | Not Rated [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Net	636	687
Residential Portfolio Segment [Member] | Pass [Member] | Construction Loans [Member]
Financing Receivable, Net	2,114	1,234
Residential Portfolio Segment [Member] | Pass [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	1,273	1,321
Residential Portfolio Segment [Member] | Pass [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	24,178	25,606
Residential Portfolio Segment [Member] | Special Mention [Member] | Construction Loans [Member]
Financing Receivable, Net	0	0
Residential Portfolio Segment [Member] | Special Mention [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	0	0
Residential Portfolio Segment [Member] | Special Mention [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	57	59
Residential Portfolio Segment [Member] | Substandard [Member] | Construction Loans [Member]
Financing Receivable, Net	0	0
Residential Portfolio Segment [Member] | Substandard [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	0	0
Residential Portfolio Segment [Member] | Substandard [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	107	0
Residential Portfolio Segment [Member] | Doubtful [Member] | Construction Loans [Member]
Financing Receivable, Net	0	0
Residential Portfolio Segment [Member] | Doubtful [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	20	22
Residential Portfolio Segment [Member] | Doubtful [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	27	133
Residential Portfolio Segment [Member] | Not Rated [Member] | Construction Loans [Member]
Financing Receivable, Net	4,267	3,141
Residential Portfolio Segment [Member] | Not Rated [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	145,381	142,163
Residential Portfolio Segment [Member] | Not Rated [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	268	265
Consumer Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Net	559	605
Consumer Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Net	0	0
Consumer Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Net	0	0
Consumer Portfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Net	0	0
Consumer Portfolio Segment [Member] | Not Rated [Member]
Financing Receivable, Net	$ 54,300	$ 44,344