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, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
BASIC EARNINGS PER SHARE
Net (loss) income		$ (3,168)	$ 220	$ (17,201)	$ (16,877)
Weighted average shares outstanding during the period, net of treasury shares (a) (in shares)	[1]	25,893	25,581	25,828	25,546
Weighted average vested restricted stock units outstanding (in shares)		206	245	215	245
Weighted average shares outstanding (in shares)		26,132	25,875	26,083	25,835
Basic (loss) earnings per share (in dollars per share)		$ (0.12)	$ 0.01	$ (0.66)	$ (0.65)
Basic (in shares)		26,132	25,875	26,083	25,835
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[2]		562
Weighted average shares outstanding (c) (in shares)	[3]	26,132	26,437	26,083	25,835
Diluted (loss) earnings per share (in dollars per share)		$ (0.12)	$ 0.01	$ (0.66)	$ (0.65)
Restricted Stock Units (RSUs) [Member]
BASIC EARNINGS PER SHARE
Weighted average vested restricted stock units outstanding (in shares)		33	49	40	44

[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 3,536,732 common shares and 3,569,762 common shares for the three months ended December 31, 2018 and 2017, respectively, were not included in the computation of the three month diluted loss per share because the exercise price was greater than the average fair market value of the common shares. Additionally, options to purchase 3,356,101 common shares and 3,549,705 common shares for the six months ended at December 31, 2018 and 2017, respectively, were not included in the computation of the six month diluted loss per share because the exercise price was greater than the average fair market value of the common shares. For the three months ended and the six months ended in December 31, 2018 and December 31, 2017, the effect of dilutive securities was not included in the calculation of diluted loss per share because there was a net loss for the period.