Note 3 - Earnings 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, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2017		Jun. 30, 2016		Jun. 30, 2015		Jun. 30, 2014	Jun. 30, 2013
BASIC EARNINGS PER SHARE
Basic earnings per share (in dollars per share)		$ 0.03	$ (0.02)	$ 0.08	$ 0.03	$ 0.06	$ 0.02	$ 0.15	$ 0.15	$ 0.07	$ 0.02	$ 0.06	$ 0.06	$ 0.12		$ 0.38		$ 0.21		$ 0.04	$ (0.01)
DILUTED EARNINGS PER SHARE
Net income		$ 696	$ (531)	$ 2,006	$ 829	$ 1,428	$ 522	$ 3,782	$ 3,750	$ 1,643	$ 393	$ 1,588	$ 1,527	$ 3,000		$ 9,482		$ 5,151		$ 930	$ (123)
Weighted average shares outstanding during the period, net of treasury shares (a) (in shares)	[1]													25,144		24,720		24,187
Weighted average vested units and shares outstanding (in shares)														255		244		309
Weighted average shares outstanding (in shares)														25,436		24,988		24,496		24,388	24,313
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[2]													552		604		142
Weighted average shares outstanding (c) (in shares)														25,988	[3]	25,592	[3]	24,638	[3]	24,546	24,313
Diluted earnings per share (in dollars per share)		$ 0.03	$ (0.02)	$ 0.08	$ 0.03	$ 0.06	$ 0.02	$ 0.15	$ 0.15	$ 0.07	$ 0.02	$ 0.06	$ 0.06	$ 0.12		$ 0.37		$ 0.21		$ 0.04	$ (0.01)
Restricted Stock Units (RSUs) [Member]
DILUTED EARNINGS PER SHARE
Weighted average vested units and shares outstanding (in shares)														37		24

[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 1,331,300 common shares, 1,331,300 common shares, and 1,882,722 common shares at June 30, 2017, 2016, and 2015, respectively, were not included in the computation of diluted earnings per share because the exercise price was greater than the average fair market value of the common shares.