Note 3 - Loans - Loans Past Due (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status	1,187	6,034
Financing Receivable, Recorded Investment, Past Due	274	2,728
Financing Receivable, Recorded Investment, Not Past Due	273,174	254,099
Financing Receivable, Recorded Investment, Total	273,448	256,827
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due	35	204
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	239	2,524
Financing Receivable, Recorded Investment, Past Due	239	2,524
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status	368	1,009
Financing Receivable, Recorded Investment, Past Due	35	123
Financing Receivable, Recorded Investment, Not Past Due	46,402	43,125
Financing Receivable, Recorded Investment, Total	46,437	43,248
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due		123
Commercial Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due
Commercial Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due	35
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Total	163,763	160,839
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status		384
Financing Receivable, Recorded Investment, Past Due
Financing Receivable, Recorded Investment, Not Past Due	5,596	7,764
Financing Receivable, Recorded Investment, Total	5,596	7,764
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status	729	4,000
Financing Receivable, Recorded Investment, Past Due	130	2,169
Financing Receivable, Recorded Investment, Not Past Due	158,037	150,906
Financing Receivable, Recorded Investment, Total	158,167	153,075
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due		59
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due
Commercial Real Estate Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Past Due	130	2,110
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Total	58,104	46,924
Residential Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due
Financing Receivable, Recorded Investment, Not Past Due	1,996	1,270
Financing Receivable, Recorded Investment, Total	1,996	1,270
Residential Portfolio Segment [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status	90	234
Financing Receivable, Recorded Investment, Past Due	87	233
Financing Receivable, Recorded Investment, Not Past Due	41,605	30,947
Financing Receivable, Recorded Investment, Total	41,692	31,180
Residential Portfolio Segment [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status		407
Financing Receivable, Recorded Investment, Past Due		196
Financing Receivable, Recorded Investment, Not Past Due	14,416	14,278
Financing Receivable, Recorded Investment, Total	14,416	14,474
Residential Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due
Residential Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Past Due	13	15
Residential Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Past Due
Residential Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due
Residential Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Past Due
Residential Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Past Due
Residential Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due
Residential Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Past Due	74	218
Residential Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Past Due		196
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Nonaccrual Status
Financing Receivable, Recorded Investment, Past Due	22	7
Financing Receivable, Recorded Investment, Not Past Due	5,122	5,809
Financing Receivable, Recorded Investment, Total	5,144	5,816
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due	22	7
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due
Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due