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				6 Months Ended
		Dec. 31, 2023	Sep. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022
Net Income		$ 5,906	$ 8,028	$ 6,417	$ 6,261	$ 13,934	$ 12,678
Weighted average shares outstanding during the period, net of treasury shares (in shares)		27,979		27,005		27,858	26,890
Weighted average vested restricted stock units outstanding (in shares)		969		956		954	903
Weighted average shares outstanding (in shares)		29,024		28,078		28,890	27,874
Basic earnings per common share (in dollars per share)		$ 0.2		$ 0.23		$ 0.48	$ 0.45
Basic (in shares)		29,024		28,078		28,890	27,874
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[1]	1,019		1,126		1,059	892
Weighted average shares outstanding (in shares)		30,043		29,204		29,949	28,766
Diluted earnings per common share (in dollars per share)		$ 0.2		$ 0.22		$ 0.47	$ 0.44
Anti-dilutive securities (b) (in shares)		0		85		0	452
Restricted Stock Units (RSUs) [Member]
Weighted average vested restricted stock units outstanding (in shares)		76		117		78	81

[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.