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		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Numerator
Net (loss) income	$ (3,070)	$ 1,813	$ (3,765)	$ 2,866
Denominator
Basic weighted average common shares outstanding (in shares)	5,850,131	5,866,494	5,850,131	5,893,071
Dilutive effect of restricted stock (in shares)	0	7,000	0	15,000
Diluted weighted average common shares outstanding (in shares)	5,850,131	5,873,129	5,850,131	5,908,287
Basic net (loss) income per common share (in dollars per share)	$ (0.52)	$ 0.31	$ (0.64)	$ 0.49
Diluted net (loss) income per common share (in dollars per share)	$ (0.52)	$ 0.31	$ (0.64)	$ 0.49