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, 2024	Dec. 31, 2023	Sep. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Mar. 31, 2024	Mar. 31, 2023
Net Income		$ 5,375	$ 5,906	$ 8,028	$ 4,669	$ 6,417	$ 6,261	$ 19,309	$ 17,347
Weighted average shares outstanding during the period, net of treasury shares (in shares)		28,084			27,376			27,933	27,050
Weighted average vested restricted stock units outstanding (in shares)		1,004			878			970	892
Weighted average shares outstanding (in shares)		29,163			28,306			28,981	28,012
Basic earnings per common share (in dollars per share)		$ 0.18			$ 0.16			$ 0.67	$ 0.62
Basic (in shares)		29,163			28,306			28,981	28,012
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[1]	959			1,305			1,024	1,043
Weighted average shares outstanding (in shares)		30,122			29,611			30,005	29,055
Diluted earnings per common share (in dollars per share)		$ 0.18			$ 0.16			$ 0.64	$ 0.6
Anti-dilutive securities (b) (in shares)	[2]	3			0			10	181
Restricted Stock Units (RSUs) [Member]
Weighted average vested restricted stock units outstanding (in shares)		75			52			78	70

[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, 2024, and March 31, 2023, 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.