Note 3 - Loans - Impaired Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016
Impaired Financing Receivable, Unpaid Principal Balance	$ 3,161	$ 7,416
Impaired Financing Receivable, Recorded Investment	2,234	6,892
Impaired Financing Receivable, Related Allowance	44	874
Impaired Financing Receivable, Average Recorded Investment	3,551	4,650
Impaired Financing Receivable, Interest Income, Accrual Method	218	10
Impaired Financing Receivable, Interest Income, Cash Basis Method	218	10
Commercial Portfolio Segment [Member]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	482	1,033
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	444	1,029
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	207	95
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	80
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	80
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		386
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		384
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	87	52
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	6
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	6
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Real Estate Loans [Member]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	1,884	1,103
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	21	8
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	21	8
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	548	2,802
Impaired Financing Receivable, with Related Allowance, Recorded Investment	548	2,615
Impaired Financing Receivable, Related Allowance	42	868
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	1,928	2,121
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	1,039	2,106
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	951	2,344
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method	105
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method	105
Residential Portfolio Segment [Member] | Residential Real Estate Owner Occupied Loans [Member]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment	120	149
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method	6
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method	6
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance	99	177
Impaired Financing Receivable, with Related Allowance, Recorded Investment	100	177
Impaired Financing Receivable, Related Allowance	2	6
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance	104	175
Impaired Financing Receivable, with No Related Allowance, Recorded Investment	103	174
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	119	357
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method		2
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method		2
Residential Portfolio Segment [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Impaired Financing Receivable, with Related Allowance, Average Recorded Investment		115
Impaired Financing Receivable, with Related Allowance, Interest Income, Accrual Method
Impaired Financing Receivable, with Related Allowance, Interest Income, Cash Basis Method
Impaired Financing Receivable, with Related Allowance, Unpaid Principal Balance
Impaired Financing Receivable, with Related Allowance, Recorded Investment
Impaired Financing Receivable, Related Allowance
Impaired Financing Receivable, with No Related Allowance, Unpaid Principal Balance		722
Impaired Financing Receivable, with No Related Allowance, Recorded Investment		407
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment	183	435
Impaired Financing Receivable, with No Related Allowance, Interest Income, Accrual Method
Impaired Financing Receivable, with No Related Allowance, Interest Income, Cash Basis Method