Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Jun. 30, 2021	29,838,177			34,900
Balance at Jun. 30, 2021	$ 60	$ 50,516	$ (36,143)	$ (99)	$ 14,334
Stock compensation expense for employee stock options	0	37	0	0	37
Net loss	$ 0	0	516	$ 0	516
Shares issued upon exercise of stock options (in shares)	17,000			0
Shares issued upon exercise of stock options	$ 0	4	0	$ 0	4
Balance (in shares) at Sep. 30, 2021	29,855,177			34,900
Balance at Sep. 30, 2021	$ 60	50,557	(36,627)	$ (99)	14,891
Balance (in shares) at Jun. 30, 2022	29,984,510			34,900
Balance at Jun. 30, 2022	$ 60	50,919	(32,305)	$ (99)	18,575
Stock compensation expense for employee stock options	0	81	0	0	81
Net loss	$ 0	0	(35)	$ 0	(35)
Balance (in shares) at Sep. 30, 2022	29,984,510			34,900
Balance at Sep. 30, 2022	$ 60	$ 51,000	$ (32,340)	$ (99)	$ 18,621