Note 12 - Fair Value - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Securities, available-for-sale	$ 142,086	$ 133,369
US Government-sponsored Enterprises Debt Securities [Member]
Securities, available-for-sale	12,587	10,044
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	12,587	10,044
US Government-sponsored Enterprises Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale
US States and Political Subdivisions Debt Securities [Member]
Securities, available-for-sale	57,460	55,954
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	57,460	55,954
US States and Political Subdivisions Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale
Residential Mortgage Backed Securities [Member]
Securities, available-for-sale	63,838	59,596
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	63,838	59,596
Residential Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale
Commercial Mortgage Backed Securities [Member]
Securities, available-for-sale	1,458	1,526
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	1,458	1,526
Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale
Collateralized Mortgage Backed Securities [Member]
Securities, available-for-sale	6,211	5,820
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	6,211	5,820
Collateralized Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale
Pooled Trust Preferred Securities Subject to Mandatory Redemption [Member]
Securities, available-for-sale	532	429
Pooled Trust Preferred Securities Subject to Mandatory Redemption [Member] | Fair Value, Inputs, Level 1 [Member]
Securities, available-for-sale
Pooled Trust Preferred Securities Subject to Mandatory Redemption [Member] | Fair Value, Inputs, Level 2 [Member]
Securities, available-for-sale	532	429
Pooled Trust Preferred Securities Subject to Mandatory Redemption [Member] | Fair Value, Inputs, Level 3 [Member]
Securities, available-for-sale