Note 4 - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Net of Treasury Shares [Member]
BASIC EARNINGS PER SHARE
Weighted average shares outstanding during the period, net of treasury shares (a) (in shares)	[1]	24,807	24,203	24,648	24,149
Weighted average shares outstanding (in shares)	[1]	24,807	24,203	24,648	24,149
DILUTED EARNINGS PER SHARE
Weighted average shares outstanding (in shares)	[1]	24,807	24,203	24,648	24,149
Net income		$ 522	$ 393	$ 8,054	$ 3,508
Weighted average shares outstanding during the period, net of treasury shares (a) (in shares)		25,080	24,528	24,918	24,470
Weighted average vested restricted stock units outstanding (in shares)		22		25
Weighted average shares outstanding in the Deferred Compensation Plan during the period (in shares)		251	325	245	321
Weighted average shares outstanding (in shares)		25,080	24,528	24,918	24,470
Basic earnings per share (in dollars per share)		$ 0.02	$ 0.02	$ 0.32	$ 0.14
Net income		$ 522	$ 393	$ 8,054	$ 3,508
Weighted average shares outstanding (in shares)		25,080	24,528	24,918	24,470
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[2]	620	115	576	80
Weighted average shares outstanding (c) (in shares)	[3]	25,700	24,643	25,494	24,550
Diluted earnings per share (in dollars per share)		$ 0.02	$ 0.02	$ 0.32	$ 0.14

[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 1,032,250 common shares and 1,729,273 common shares at March 31, 2016 and 2015, respectively, and options to purchase 1,391,300 common shares and 2,272,823 common shares at March 31, 2016 and 2015, respectively, were not included in the computation of the three month and nine month periods for diluted earnings per share, respectively, because the exercise price was greater than the average fair market value of the common shares.