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, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Net Income		$ 4,669	$ 3,618	$ 17,347	$ 9,856
Weighted average shares outstanding during the period, net of treasury shares (in shares)		27,376	26,642	27,050	26,606
Weighted average vested restricted stock units outstanding (in shares)		878	705	892	588
Weighted average shares outstanding (in shares)		28,306	27,378	28,012	27,220
Basic income per share (in dollars per share)		$ 0.16	$ 0.13	$ 0.62	$ 0.36
Basic (in shares)		28,306	27,378	28,012	27,220
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[1]	1,305	705	1,043	725
Weighted average shares outstanding (in shares)		29,611	28,083	29,055	27,945
Diluted income per share (in dollars per share)		$ 0.16	$ 0.13	$ 0.60	$ 0.35
Anti-dilutive securities (b) (in shares)	[2]	0	1,427	181	1,043
Restricted Stock Units (RSUs) [Member]
Weighted average vested restricted stock units outstanding (in shares)		52	31	70	26

[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 months ended March 31, 2023, and March 31, 2022, 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.