Note 3 - Loans - Recorded Investment by Risk Category (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Jun. 30, 2018
Pass [Member]
Financing Receivable, Net	$ 262,086	$ 253,774
Special Mention [Member]
Financing Receivable, Net	7,508	7,544
Substandard [Member]
Financing Receivable, Net	3,694	3,484
Doubtful [Member]
Financing Receivable, Net	973	1,011
Not Rated [Member]
Financing Receivable, Net	55,280	53,428
Commercial Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Net	60,364	59,214
Commercial Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Net	428	288
Commercial Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Net	1,080	1,162
Commercial Portfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Net
Commercial Portfolio Segment [Member] | Not Rated [Member]
Financing Receivable, Net	453	415
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction Loans [Member]
Financing Receivable, Net	4,555	5,386
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Net	180,579	172,471
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	6,793	7,061
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	2,177	1,878
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	675	702
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	959	1,255
Residential Portfolio Segment [Member] | Pass [Member] | Construction Loans [Member]
Financing Receivable, Net	695	8
Residential Portfolio Segment [Member] | Pass [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	2,375	2,577
Residential Portfolio Segment [Member] | Pass [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	13,438	14,025
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	95
Residential Portfolio Segment [Member] | Special Mention [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	192	195
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	27	27
Residential Portfolio Segment [Member] | Substandard [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	410	417
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	9	11
Residential Portfolio Segment [Member] | Doubtful [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	289	298
Residential Portfolio Segment [Member] | Not Rated [Member] | Construction Loans [Member]
Financing Receivable, Net	1,142	1,182
Residential Portfolio Segment [Member] | Not Rated [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	47,499	45,214
Residential Portfolio Segment [Member] | Not Rated [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	446	579
Consumer Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Net	80	93
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	$ 4,781	$ 4,783