Note 4 - Loans - Recorded Investment by Risk Category (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jun. 30, 2019
Pass [Member]
Financing Receivable, Net	$ 306,858	$ 286,110
Special Mention [Member]
Financing Receivable, Net	8,123	13,218
Substandard [Member]
Financing Receivable, Net	9,281	6,691
Doubtful [Member]
Financing Receivable, Net	427	704
Not Rated [Member]
Financing Receivable, Net	72,566	63,343
Commercial Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Net	71,131	74,393
Commercial Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Net	552	4,942
Commercial Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Net	4,450	1,012
Commercial Portfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Net
Commercial Portfolio Segment [Member] | Not Rated [Member]
Financing Receivable, Net	283	240
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction Loans [Member]
Financing Receivable, Net	16,205	16,075
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Net	202,871	179,952
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Construction Loans [Member]
Financing Receivable, Net
Commercial Real Estate Portfolio Segment [Member] | Special Mention [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Net	7,376	8,071
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Construction Loans [Member]
Financing Receivable, Net
Commercial Real Estate Portfolio Segment [Member] | Substandard [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Net	4,574	5,337
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Construction Loans [Member]
Financing Receivable, Net
Commercial Real Estate Portfolio Segment [Member] | Doubtful [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Net	176	436
Commercial Real Estate Portfolio Segment [Member] | Not Rated [Member] | Construction Loans [Member]
Financing Receivable, Net
Commercial Real Estate Portfolio Segment [Member] | Not Rated [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Net	1,227	1,496
Residential Portfolio Segment [Member] | Pass [Member] | Construction Loans [Member]
Financing Receivable, Net	456
Residential Portfolio Segment [Member] | Pass [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	2,049	2,245
Residential Portfolio Segment [Member] | Pass [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	14,129	13,413
Residential Portfolio Segment [Member] | Special Mention [Member] | Construction Loans [Member]
Financing Receivable, Net
Residential Portfolio Segment [Member] | Special Mention [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net
Residential Portfolio Segment [Member] | Special Mention [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	195	205
Residential Portfolio Segment [Member] | Substandard [Member] | Construction Loans [Member]
Financing Receivable, Net
Residential Portfolio Segment [Member] | Substandard [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	22	24
Residential Portfolio Segment [Member] | Substandard [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	235	318
Residential Portfolio Segment [Member] | Doubtful [Member] | Construction Loans [Member]
Financing Receivable, Net
Residential Portfolio Segment [Member] | Doubtful [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	3	5
Residential Portfolio Segment [Member] | Doubtful [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	248	263
Residential Portfolio Segment [Member] | Not Rated [Member] | Construction Loans [Member]
Financing Receivable, Net	4,347	1,963
Residential Portfolio Segment [Member] | Not Rated [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	59,941	54,193
Residential Portfolio Segment [Member] | Not Rated [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	299	319
Consumer Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Net	17	32
Consumer Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Net
Consumer Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Net
Consumer Portfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Net
Consumer Portfolio Segment [Member] | Not Rated [Member]
Financing Receivable, Net	$ 6,469	$ 5,132