Consolidated Statements of Shareholders' Equity - USD ($)	Common Class A [Member] Common Stock [Member]	Common Class A [Member]	Common Class B [Member] Common Stock [Member]	Common Class B [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2021	$ 5,000		$ 1,000		$ 11,176,000	$ (73,000)	$ 3,276,000	$ 14,385,000
Balance (in Shares) at Dec. 31, 2021	5,113,568	5,233,568	762,612	762,612
Consolidated net income							3,208,000	3,208,000
Other comprehensive loss						15,000		15,000
Exercise stock options					208,000			$ 208,000
Exercise stock options (in Shares)	120,000							120,000
Amortization of stock based compensation					23,000			$ 23,000
Cash dividends		$ (1,492,000)		$ (217,000)			(1,703,000)	(1,703,000)
Balance at Dec. 31, 2022	$ 5,000		$ 1,000		11,407,000	(58,000)	4,781,000	16,136,000
Balance (in Shares) at Dec. 31, 2022	5,233,568	5,233,568	762,612	762,612
Consolidated net income							1,845,000	1,845,000
Other comprehensive loss						(3,000)		(3,000)
Exercise stock options					54,000			$ 54,000
Exercise stock options (in Shares)	25,000							25,000
Amortization of stock based compensation					13,000			$ 13,000
Cash dividends		$ (1,049,000)		$ (152,000)			(1,202,000)	(1,202,000)
Balance at Dec. 31, 2023	$ 5,000		$ 1,000		$ 11,474,000	$ (61,000)	$ 5,424,000	$ 16,843,000
Balance (in Shares) at Dec. 31, 2023	5,258,568	5,258,568	762,612	762,612