Note 4 - Earnings Per Common Share - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Net Income		$ 1,472	$ 1,861	$ 5,670	$ 8,079
Weighted average shares outstanding during the period, net of treasury shares (in shares)		26,467	26,151	26,384	26,087
Weighted average vested restricted stock units outstanding (in shares)		284	144	242	156
Weighted average shares outstanding (in shares)		26,771	26,301	26,642	26,250
Basic income per share (in dollars per share)		$ 0.05	$ 0.07	$ 0.21	$ 0.31
Basic (in shares)		26,771	26,301	26,642	26,250
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[1]	956	322	710	173
Weighted average shares outstanding (in shares)		27,727	26,623	27,352	26,423
Diluted income per share (in dollars per share)		$ 0.05	$ 0.07	$ 0.21	$ 0.31
Anti-dilutive securities (b) (in shares)	[2]	654	1,875	1,017	2,038
Restricted Stock Units (RSUs) [Member]
Weighted average vested restricted stock units outstanding (in shares)		20	6	16	7

[1] Calculated using the "Treasury Stock" method as if dilutive securities were exercised and the funds were used to purchase common shares at the average market price during the period.

[2] Anti-dilutive securities were excluded from the computation of diluted net income per share for the three and nine months ended March 31, 2021 and March 31, 2020 because the exercise price was greater than the average fair market price of the common shares or because the assumed proceeds from the award’s exercise or vesting was greater than the average fair market price of the common shares.