Note 6 - Earnings Per Share (EPS) - Number of Shared Outstanding for Basic and Diluted EPS (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Net income	$ 5,125	$ 3,304	$ 9,659	$ 7,890
Basic (in shares)	9,048,397	8,924,495	9,022,161	8,883,003
Incremental shares from assumed exercise of dilutive securities (in shares)	153,160	243,589	170,482	246,007
Weighted average shares used in calculation of diluted EPS (in shares)	9,201,557	9,168,084	9,192,643	9,129,010
Basic (in dollars per share)	$ 0.57	$ 0.37	$ 1.07	$ 0.89
Diluted (in dollars per share)	$ 0.56	$ 0.36	$ 1.05	$ 0.86