Note 4 - Earnings Per Common Share - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended			9 Months Ended
		Mar. 31, 2017	Mar. 31, 2016		Mar. 31, 2017		Mar. 31, 2016
BASIC EARNINGS PER SHARE
Net income		$ (531)	$ 522		$ 2,304		$ 8,054
Weighted average shares outstanding during the period, net of treasury shares (a) (in shares)	[1]	25,155,000	24,807,000		25,056,000		24,648,000
Weighted average vested units and shares outstanding (in shares)		260,000	251,000		253,000		245,000
Weighted average shares outstanding (in shares)		25,452,000	25,080,000		25,346,000		24,918,000
Basic earnings (loss) per share (in dollars per share)		$ (0.02)	$ 0.02		$ 0.09		$ 0.32
DILUTED EARNINGS PER SHARE
Net income		$ (531)	$ 522		$ 2,304		$ 8,054
Basic (in shares)		25,452,000	25,080,000		25,346,000		24,918,000
Weighted average stock warrants outstanding (in shares)					28,000
Effect of dilutive securities (b): Impact of common shares to be issued under stock incentive plans, and contingently issuable shares, if any (in shares)		0	620,000	[2]	535,000	[2]	576,000	[2]
Weighted average shares outstanding (c) (in shares)	[3]	25,452,000	25,700,000		25,909,000		25,494,000
Basic earnings (loss) per share (in dollars per share)		$ (0.02)	$ 0.02		$ 0.09		$ 0.32
Restricted Stock Units (RSUs) [Member]
BASIC EARNINGS PER SHARE
Weighted average vested units and shares outstanding (in shares)		37,000	22,000		37,000		25,000

[1] Includes shares accounted for like treasury stock included in the Company's non-qualified deferred compensation plan. (See Note 10.)

[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 1,032,250 common shares at March 31, 2016, and options to purchase 1,683,883 common shares and 1,391,300 common shares at March 31, 2017 and 2016, respectively were not included in the computation of the three month and nine month periods 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 March 31, 2017, the effect of dilutive securities was not included in the calculation of diluted earnings per share because there was a net operating loss for the period.