Note A - Basis of Presentation and Summary of Significant Accounting Policies - Calculation of Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Numerator
Net (loss) income	$ (695)	$ 1,053
Denominator
Basic weighted average common shares outstanding (in shares)	5,850,131	5,919,649
Dilutive effect of restricted stock (in shares)	0	23,000
Diluted weighted average common shares outstanding (in shares)	5,850,131	5,943,446
Basic net (loss) income per common share (in dollars per share)	$ (0.12)	$ 0.18
Diluted net (loss) income per common share (in dollars per share)	$ (0.12)	$ 0.18