Note 10 - Fair Value Measurements - Gains (Losses) on Assets Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Gain (Loss) on assets	$ (78)	$ (173)	$ (397)	$ (196)
Collateral Dependent Impaired Loans [Member]
Gain (Loss) on assets	(22)	(328)	(234)	(351)
Real Estate Owned and Other Repossessed Collateral [Member]
Gain (Loss) on assets	(25)	45	(25)	45
Loan Servicing Rights [Member]
Gain (Loss) on assets	$ (31)	$ 110	$ (138)	$ 110