Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock, Common [Member]	Total
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
Compensation expense for employee stock options	0	320	0	0	320
Net income (loss)	$ 0	0	(34)	$ 0	$ (34)
Shares issued upon exercise of stock options (in shares)					(0)
Balance (in shares) at Jun. 30, 2023	29,984,510			34,900
Balance at Jun. 30, 2023	$ 60	51,239	(32,339)	$ (99)	$ 18,861
Compensation expense for employee stock options	0	252	0	0	252
Net income (loss)	$ 0	0	112	$ 0	$ 112
Shares issued upon exercise of stock options (in shares)	150,000			0	150,000
Shares issued upon exercise of stock options	$ 0	13	0	$ 0	$ 13
Balance (in shares) at Jun. 30, 2024	30,134,510			34,900
Balance at Jun. 30, 2024	$ 60	$ 51,504	$ (32,227)	$ (99)	$ 19,238