Condensed Consolidated Financial Statements of Stockholders' Equity (Unaudited) - USD ($)	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	$ 60,000	$ 50,919,000	$ (32,305,000)	$ (99,000)	$ 18,575,000
Stock compensation expense for employee stock options	0	81,000	0	0	81,000
Net (loss) income	0	0	(35,000)	0	(35,000)
Net loss	$ 0	0	(35,000)	$ 0	(35,000)
Balance (in shares) at Sep. 30, 2022	29,984,510			34,900
Balance at Sep. 30, 2022	$ 60,000	51,000,000	(32,340,000)	$ (99,000)	18,621,000
Balance (in shares) at Jun. 30, 2022	29,984,510			34,900
Balance at Jun. 30, 2022	$ 60,000	50,919,000	(32,305,000)	$ (99,000)	18,575,000
Net (loss) income					(74,000)
Net loss					(74,000)
Balance (in shares) at Mar. 31, 2023	29,984,510			34,900
Balance at Mar. 31, 2023	$ 60	51,159	(32,379)	$ (99)	18,741
Balance (in shares) at Sep. 30, 2022	29,984,510			34,900
Balance at Sep. 30, 2022	$ 60,000	51,000,000	(32,340,000)	$ (99,000)	18,621,000
Stock compensation expense for employee stock options	0	86,000	0	0	86,000
Net (loss) income	0	0	(55,000)	0	(55,000)
Net loss	$ 0	0	(55,000)	$ 0	(55,000)
Balance (in shares) at Dec. 31, 2022	29,984,510			34,900
Balance at Dec. 31, 2022	$ 60,000	51,086,000	(32,395,000)	$ (99,000)	18,652,000
Stock compensation expense for employee stock options	0	73,000	0	0	73,000
Net (loss) income	0	0	16,000	0	16,000
Net loss	$ 0	0	16,000	$ 0	16,000
Balance (in shares) at Mar. 31, 2023	29,984,510			34,900
Balance at Mar. 31, 2023	$ 60	51,159	(32,379)	$ (99)	18,741
Balance (in shares) at Jun. 30, 2023	29,984,510			34,900
Balance at Jun. 30, 2023	$ 60,000	51,239,000	(32,339,000)	$ (99,000)	18,861,000
Stock compensation expense for employee stock options	$ 0	71,000	0	$ 0	71,000
Shares issued upon exercise of stock options (in shares)	150,000			0
Shares issued upon exercise of stock options	$ 0	13,000	0	$ 0	13,000
Net (loss) income	0	0	(59,000)	0	(59,000)
Net loss	$ 0	0	(59,000)	$ 0	(59,000)
Balance (in shares) at Sep. 30, 2023	30,134,510			34,900
Balance at Sep. 30, 2023	$ 60,000	51,323,000	(32,398,000)	$ (99,000)	18,886,000
Balance (in shares) at Jun. 30, 2023	29,984,510			34,900
Balance at Jun. 30, 2023	$ 60,000	51,239,000	(32,339,000)	$ (99,000)	$ 18,861,000
Shares issued upon exercise of stock options (in shares)					150,000
Net (loss) income					$ (156,000)
Net loss					(156,000)
Balance (in shares) at Mar. 31, 2024	30,134,510			34,900
Balance at Mar. 31, 2024	$ 60,000	51,445,000	(32,495,000)	$ (99,000)	18,911,000
Balance (in shares) at Sep. 30, 2023	30,134,510			34,900
Balance at Sep. 30, 2023	$ 60,000	51,323,000	(32,398,000)	$ (99,000)	18,886,000
Stock compensation expense for employee stock options	0	62,000	0	0	62,000
Net (loss) income	0	0	(382,000)	0	(382,000)
Net loss	$ 0	0	(382,000)	$ 0	(382,000)
Balance (in shares) at Dec. 31, 2023	30,134,510			34,900
Balance at Dec. 31, 2023	$ 60,000	51,385,000	(32,780,000)	$ (99,000)	18,566,000
Stock compensation expense for employee stock options	0	60,000	0	0	60,000
Net (loss) income	0	0	285,000	0	285,000
Net loss	$ 0	0	285,000	$ 0	285,000
Balance (in shares) at Mar. 31, 2024	30,134,510			34,900
Balance at Mar. 31, 2024	$ 60,000	$ 51,445,000	$ (32,495,000)	$ (99,000)	$ 18,911,000