Note 3 - Loans - Recorded Investment by Risk Category (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Pass [Member]
Financing Receivable, Net	$ 259,571	$ 253,774
Special Mention [Member]
Financing Receivable, Net	12,312	7,544
Substandard [Member]
Financing Receivable, Net	3,459	3,484
Doubtful [Member]
Financing Receivable, Net	819	1,011
Not Rated [Member]
Financing Receivable, Net	58,185	53,428
Commercial Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Net	62,251	59,214
Commercial Portfolio Segment [Member] | Special Mention [Member]
Financing Receivable, Net	525	288
Commercial Portfolio Segment [Member] | Substandard [Member]
Financing Receivable, Net	1,054	1,162
Commercial Portfolio Segment [Member] | Doubtful [Member]
Financing Receivable, Net
Commercial Portfolio Segment [Member] | Not Rated [Member]
Financing Receivable, Net	404	415
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Construction Loans [Member]
Financing Receivable, Net	6,281	5,386
Commercial Real Estate Portfolio Segment [Member] | Pass [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Net	174,444	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	11,507	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	2,048	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	531	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	1,115	1,255
Residential Portfolio Segment [Member] | Pass [Member] | Construction Loans [Member]
Financing Receivable, Net	693	8
Residential Portfolio Segment [Member] | Pass [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	2,490	2,577
Residential Portfolio Segment [Member] | Pass [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	13,369	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	92
Residential Portfolio Segment [Member] | Special Mention [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	188	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	25	27
Residential Portfolio Segment [Member] | Substandard [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	332	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	8	11
Residential Portfolio Segment [Member] | Doubtful [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	280	298
Residential Portfolio Segment [Member] | Not Rated [Member] | Construction Loans [Member]
Financing Receivable, Net	1,755	1,182
Residential Portfolio Segment [Member] | Not Rated [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Net	49,488	45,214
Residential Portfolio Segment [Member] | Not Rated [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Net	442	579
Consumer Portfolio Segment [Member] | Pass [Member]
Financing Receivable, Net	43	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	$ 4,981	$ 4,783