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, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
BASIC EARNINGS PER SHARE
Net (loss) income		$ (1,468)	$ 2,006	$ (17,097)	$ 2,835
Weighted average shares outstanding during the period, net of treasury shares (a) (in shares)	[1]	25,551	25,016	25,528	25,007
Weighted average vested units and shares outstanding (in shares)		244	261	244	250
Weighted average shares outstanding (in shares)		25,858	25,314	25,824	25,294
Basic (loss) earnings per share (in dollars per share)		$ (0.06)	$ 0.08	$ (0.66)	$ 0.11
DILUTED EARNINGS PER SHARE
Net (loss) income		$ (1,468)	$ 2,006	$ (17,097)	$ 2,835
Basic (in shares)		25,858	25,314	25,824	25,294
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[2]		489		565
Weighted average shares outstanding (c) (in shares)	[3]	25,858	25,803	25,824	25,859
Diluted (loss) earnings per share (in dollars per share)		$ (0.06)	$ 0.08	$ (0.66)	$ 0.11
Restricted Stock Units (RSUs) [Member]
BASIC EARNINGS PER SHARE
Weighted average vested units and shares outstanding (in shares)		63	37	52	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 3,569,762 common shares and 1,682,270 common shares for the three months ended December 31, 2017 and 2016, respectively, and options to purchase 3,549,705 common shares and 1,626,770 common shares for the six months ended December 31, 2017 and 2016, respectively were not included in the computation of the three month and six 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 and six months ended December 31, 2017, 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.