Note 4 - Basic and Diluted Earnings Per Share (Details) - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Net of Treasury Shares [Member]
BASIC EARNINGS PER SHARE
Weighted average shares outstanding during the period, net of treasury shares (a) (in shares)	[1]	24,637	24,124	24,569	24,123
Weighted average shares outstanding (in shares)	[1]	24,637	24,124	24,569	24,123
DILUTED EARNINGS PER SHARE
Weighted average shares outstanding (in shares)	[1]	24,637	24,124	24,569	24,123
Net income		$ 3,782	$ 1,588	$ 7,532	$ 3,115
Weighted average shares outstanding during the period, net of treasury shares (a) (in shares)		24,911	24,449	24,838	24,442
Weighted average vested restricted stock units outstanding (in shares)		25		26
Weighted average shares outstanding in the Deferred Compensation Plan during the period (in shares)		249	325	243	319
Weighted average shares outstanding (in shares)		24,911	24,449	24,838	24,442
Basic earnings per share (in dollars per share)		$ 0.15	$ 0.06	$ 0.30	$ 0.13
Net income		$ 3,782	$ 1,588	$ 7,532	$ 3,115
Weighted average shares outstanding (in shares)		24,911	24,449	24,838	24,442
Effect of dilutive securities (b): Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[2]	713	58	567	64
Weighted average shares outstanding (c) (in shares)	[2],[3]	25,624	24,507	25,405	24,506
Diluted earnings per share (in dollars per share)	[2]	$ 0.15	$ 0.06	$ 0.30	$ 0.13

[1] Includes shares accounted for as treasury stock according to accounting standards.

[2] 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.

[3] Options to purchase 1,115,250 common shares and 2,377,900 common shares at December 31, 2015 and 2014, respectively, and options to purchase 1,506,800 common shares and 2,371,900 common shares at December 31, 2015 and 2014, respectively, were not included in the computation of the three month and six month periods for diluted earnings per share, respectively, because the exercise price was greater than the average fair market value of the common shares.