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								12 Months Ended
		Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2021	Jun. 30, 2020
Net income		$ 198	$ 1,472	$ 2,208	$ 1,990	$ 1,513	$ 1,861	$ 1,743	$ 4,475	$ 5,868	$ 9,592
Weighted average shares outstanding during the period, net of treasury shares (in shares)										26,411	26,105
Weighted average vested restricted stock units outstanding (in shares)										264	162
Weighted average shares outstanding (in shares)										26,692	26,274
Basic income per share (in dollars per share)		$ 0.01	$ 0.05	$ 0.08	$ 0.08	$ 0.06	$ 0.07	$ 0.07	$ 0.17	$ 0.22	$ 0.37
Basic (in shares)										26,692	26,274
Impact of common shares to be issued under stock option plans, and contingently issuable shares, if any (in shares)	[1]									748	199
Weighted average shares outstanding (in shares)										27,440	26,473
Diluted income per share (in dollars per share)		$ 0.01	$ 0.05	$ 0.08	$ 0.07	$ 0.06	$ 0.07	$ 0.07	$ 0.17	$ 0.21	$ 0.36
Anti-dilutive securities (b) (in shares)	[2]									976	1,957
Restricted Stock Units (RSUs) [Member]
Weighted average vested restricted stock units outstanding (in shares)										17	7

[1] Calculative 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 in the computation of diluted earnings per share for the year ended June 30, 2021 and June 30, 2020 because the exercise price was greater than the 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.