Note 5 - Earnings Per Share - Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Net income available to common shareholders	$ 913	$ 566	$ 2,499	$ 2,189
Weighted average common shares outstanding (in shares)	2,727,837	2,724,418	2,726,538	2,724,132
Basic income per share (in dollars per share)	$ 0.33	$ 0.21	$ 0.92	$ 0.80
Net income available to common shareholders	$ 913	$ 566	$ 2,499	$ 2,189
Weighted average common shares outstanding (in shares)	2,727,837	2,724,418	2,726,538	2,724,132
Dilutive effect of restricted stock (in shares)		30		25
Total common shares and dilutive potential common shares (in shares)	2,727,837	2,724,448	2,726,538	2,724,157
Dilutive income per share (in dollars per share)	$ 0.33	$ 0.21	$ 0.92	$ 0.80