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
		Sep. 30, 2020	Sep. 30, 2019
Net income (loss)		$ 1,990	$ 4,475
Weighted average shares outstanding during the period, net of treasury shares (in shares)		26,318	26,024
Weighted average vested restricted stock units outstanding (in shares)		192	188
Weighted average shares outstanding (in shares)		26,520	26,236
Basic income per share (in dollars per share)		$ 0.08	$ 0.17
Basic (in shares)		26,520	26,236
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[1]	448	57
Weighted average shares outstanding (in shares)		26,968	26,293
Diluted income per share (in dollars per share)		$ 0.07	$ 0.17
Anti-dilutive securities (b) (in shares)	[2]	1,302	2,861
Restricted Stock Units (RSUs) [Member]
Weighted average vested restricted stock units outstanding (in shares)		10	24

[1] 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.

[2] Anti-dilutive securities were excluded from the computation of diluted net income per share for the three months ended September 30, 2020 and September 30, 2019 because the exercise price was greater than the average fair market price of the common shares or because the assumed proceeds from the award’s exercise or vesting was greater than the average fair market price of the common shares.