Note 3 - (Loss) Per Common Share - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended								12 Months Ended
		Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2019	Jun. 30, 2018
Net (Loss)		$ 862	$ (3,168)	$ (15,782)	$ 1,749	$ (2,664)	$ 220	$ (1,468)	$ (15,629)	$ (16,339)	$ (19,541)
Weighted average shares outstanding during the period, net of treasury shares (a) (in shares)	[1]									25,858	25,569
Weighted average vested restricted stock units outstanding (in shares)										215	242
Weighted average shares outstanding (in shares)										26,109	25,866
Basic (loss) per share (in dollars per share)		$ 0.03	$ (0.12)	$ (0.61)	$ 0.07	$ (0.10)	$ (0.01)	$ (0.06)	$ (0.61)	$ (0.63)	$ (0.76)
Weighted average shares outstanding - Basic (in shares)										26,109	25,866
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[2]
Weighted average shares outstanding (c) (in shares)	[3]									26,109	25,866
Diluted (loss) per share (in dollars per share)		$ 0.03	$ (0.12)	$ (0.61)	$ 0.07	$ (0.10)	$ (0.01)	$ (0.06)	$ (0.61)	$ (0.63)	$ (0.76)
Restricted Stock Units (RSUs) [Member]
Weighted average vested restricted stock units outstanding (in shares)										36	55

[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 3,555,530 common shares and 2,802,420 common shares at June 30, 2019 and 2018, respectively, were not included in the computation of diluted (loss) per share because the exercise price was greater than the average fair market value of the common shares. For the years ended June 30, 2019 and June 30, 2018 the effect of dilutive securities was not included in the calculation of diluted loss per share because there was a net operating loss for the period.