Note 9 - Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Jun. 30, 2018	Jun. 30, 2017
Current income taxes		$ 687	$ 513
Deferred income tax expense		114	128
Change in corporate tax rate	$ 348	348
Total income tax expense		$ 1,149	$ 641