Note 3 - Loans - Loans Past Due (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Jun. 30, 2016
Financing Receivable, Recorded Investment, Nonaccrual Status	$ 3,385	$ 6,034
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	5
Financing Receivable, Recorded Investment, Past Due	3,071	2,728
Financing Receivable, Recorded Investment, Not Past Due	269,846	254,099
Financing Receivable, Recorded Investment, Total	272,917	256,827
Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	100
Financing Receivable, Recorded Investment, Past Due	352	204
Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	1,762
Financing Receivable, Recorded Investment, Past Due	1,768
Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	947	2,524
Financing Receivable, Recorded Investment, Past Due	951	2,524
Commercial Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	41	1,009
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due	129	123
Financing Receivable, Recorded Investment, Not Past Due	45,262	43,125
Financing Receivable, Recorded Investment, Total	45,391	43,248
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due	88	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	41
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Total	165,682	160,839
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	6	384
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due
Financing Receivable, Recorded Investment, Not Past Due	9,508	7,764
Financing Receivable, Recorded Investment, Total	9,508	7,764
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due
Commercial Real Estate Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Real Estate Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	3,054	4,000
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due	2,846	2,169
Financing Receivable, Recorded Investment, Not Past Due	153,328	150,906
Financing Receivable, Recorded Investment, Total	156,174	153,075
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Real Estate Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due	253	59
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Real Estate Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due	1,762
Commercial Real Estate Portfolio Segment [Member] | Other Commercial Real Estate Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due	831	2,110
Residential Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Total	57,057	46,924
Residential Portfolio Segment [Member] | Construction Loans [Member]
Financing Receivable, Recorded Investment, Past Due
Financing Receivable, Recorded Investment, Not Past Due	1,900	1,270
Financing Receivable, Recorded Investment, Total	1,900	1,270
Residential Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due
Residential Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due
Residential Portfolio Segment [Member] | Construction Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due
Residential Portfolio Segment [Member] | Residential Real Estate Owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	91	234
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due	86	233
Financing Receivable, Recorded Investment, Not Past Due	40,220	30,947
Financing Receivable, Recorded Investment, Total	40,306	31,180
Residential Portfolio Segment [Member] | Residential Real Estate Owner Occupied Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due	11	15
Residential Portfolio Segment [Member] | Residential Real Estate Owner Occupied Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due	1
Residential Portfolio Segment [Member] | Residential Real Estate Owner Occupied Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due	74	218
Residential Portfolio Segment [Member] | Residential Real Estate Non-owner Occupied Loans [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status	193	407
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing
Financing Receivable, Recorded Investment, Past Due		196
Financing Receivable, Recorded Investment, Not Past Due	14,851	14,278
Financing Receivable, Recorded Investment, Total	14,851	14,474
Residential Portfolio Segment [Member] | Residential Real Estate Non-owner Occupied Loans [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due
Residential Portfolio Segment [Member] | Residential Real Estate Non-owner Occupied Loans [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due
Residential Portfolio Segment [Member] | Residential Real Estate Non-owner Occupied Loans [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due		196
Consumer Portfolio Segment [Member]
Financing Receivable, Recorded Investment, Nonaccrual Status
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing	5
Financing Receivable, Recorded Investment, Past Due	10	7
Financing Receivable, Recorded Investment, Not Past Due	4,777	5,809
Financing Receivable, Recorded Investment, Total	4,787	5,816
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 59 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due		7
Consumer Portfolio Segment [Member] | Financing Receivables, 60 to 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due	5
Consumer Portfolio Segment [Member] | Financing Receivables, Equal to Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due	$ 5