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, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
BASIC EARNINGS PER SHARE
Net (loss) income		$ 220	$ (531)	$ (16,877)	$ 2,304
Weighted average shares outstanding during the period, net of treasury shares (a) (in shares)	[1]	25,581	25,155	25,546	25,056
Weighted average vested units and shares outstanding (in shares)		245	260	245	253
Weighted average shares outstanding (in shares)		25,875	25,452	25,835	25,346
Basic (loss) earnings per share (in dollars per share)		$ 0.01	$ (0.02)	$ (0.65)	$ 0.09
DILUTED EARNINGS PER SHARE
Net (loss) income		$ 220	$ (531)	$ (16,877)	$ 2,304
Basic (in shares)		25,875	25,452	25,835	25,346
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[2]	562			563
Weighted average shares outstanding (c) (in shares)	[3]	26,437	25,452	25,835	25,909
Diluted (loss) earnings per share (in dollars per share)		$ 0.01	$ (0.02)	$ (0.65)	$ 0.09
Restricted Stock Units (RSUs) [Member]
BASIC EARNINGS PER SHARE
Weighted average vested units and shares outstanding (in shares)		49	37	44	37

[1] Includes shares accounted for like treasury stock.

[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 1,945,348 common shares and 1,364,013 common shares for the three months ended March 31, 2018 and 2017, respectively, and options to purchase 3,086,121 common shares and 1,391,300 common shares for the nine months ended March 31, 2018 and 2017, respectively were not included in the computation of the three month and nine month period for diluted earnings per share, respectively, because the exercise price was greater than the average fair market value of the common shares. For the three months ended in March 31, 2017 and nine months ended March 31, 2018, the effect of dilutive securities was not included in the calculation of diluted earnings (loss) per share because there was a net operating loss for the period.