Note 4 - Premises and Equipment - Major Classifications of Premises and Equipment (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Premises and equipment, gross	$ 19,012	$ 18,458
Accumulated depreciation and amortization	(5,614)	(4,873)
Premises and equipment, net	13,398	13,585
Land [Member]
Premises and equipment, gross	1,469	1,469
Land Improvements [Member]
Premises and equipment, gross	340	317
Building And Leasehold Improvements [Member]
Premises and equipment, gross	12,180	11,978
Furniture and Fixtures [Member]
Premises and equipment, gross	$ 5,023	$ 4,694