Note 4 - Earnings per Share - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended								12 Months Ended
		Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2024	Jun. 30, 2023
Net Income		$ 5,668	$ 5,375	$ 5,906	$ 8,028	$ 8,414	$ 4,669	$ 6,417	$ 6,262	$ 24,977	$ 25,762
Weighted average shares outstanding during the period, net of treasury shares (in shares)										27,981	27,159
Weighted average vested restricted stock units outstanding (in shares)										987	895
Weighted average shares outstanding (in shares)										29,049	28,127
Basic income per share (in dollars per share)		$ 0.19	$ 0.18	$ 0.2	$ 0.28	$ 0.3	$ 0.16	$ 0.23	$ 0.23	$ 0.86	$ 0.92
Impact of common shares to be issued under stock option plans, and Contingently issuable shares, if any (in shares)	[1]									1,019	1,189
Weighted average shares outstanding (in shares)										30,068	29,316
Diluted (in dollars per share)	[2]	$ 0.19	$ 0.18	$ 0.2	$ 0.27	$ 0.28	$ 0.16	$ 0.22	$ 0.22	$ 0.83	$ 0.88
Anti-dilutive securities (b) (in shares)	[3]									54	154
Restricted Stock Units (RSUs) [Member]
Weighted average vested restricted stock units outstanding (in shares)										81	73

[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] The total of the earnings per share for each of the four quarters does not equal the total earnings per share for the full year because the calculations are based on the average shares outstanding during each of the individual periods. There is no difference between basic and diluted shares due to losses.

[3] Anti-dilutive securities were excluded in the computation of diluted earnings per share for the year ended June 30, 2024, and June 30, 2023, because the exercise price was greater than the 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.