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, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Numerator
Net income	$ 1,813	$ 1,847	$ 2,866	$ 5,103
Denominator
Basic weighted average common shares outstanding (in shares)	5,866,494	6,211,954	5,893,071	6,249,791
Dilutive effect of stock options and restricted stock (in shares)	7,000	44,000	15,000	54,000
Diluted weighted average common shares outstanding (in shares)	5,873,129	6,256,498	5,908,287	6,303,921
Basic net income per common share (in dollars per share)	$ 0.31	$ 0.30	$ 0.49	$ 0.82
Diluted net income per common share (in dollars per share)	$ 0.31	$ 0.30	$ 0.49	$ 0.81