Condensed Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member] Common Class A [Member]	Common Stock [Member] Common Class B [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balance (in shares) at Dec. 31, 2022	3,287,647	611,784
Balance at Dec. 31, 2022	$ 33	$ 6	$ 59,205	$ (20,754)	$ 38,490	$ (347)	$ 38,143
Net income (loss)			0	(944)	(944)	(231)	(1,175)
Balance (in shares) at Sep. 30, 2023	3,287,647	611,784
Balance at Sep. 30, 2023	$ 33	$ 6	59,206	(21,698)	37,547	(578)	36,969
Stock options - compensation costs			1	0	1	0	1
Balance (in shares) at Jun. 30, 2023	3,287,647	611,784
Balance at Jun. 30, 2023	$ 33	$ 6	59,206	(22,583)	36,662	(521)	36,141
Net income (loss)	$ 0	$ 0	0	885	885	(57)	828
Balance (in shares) at Sep. 30, 2023	3,287,647	611,784
Balance at Sep. 30, 2023	$ 33	$ 6	59,206	(21,698)	37,547	(578)	36,969
Balance (in shares) at Dec. 31, 2023	3,287,647	611,784
Balance at Dec. 31, 2023	$ 33	$ 6	59,206	(22,529)	36,716	(616)	36,100
Net income (loss)	$ 0	$ 0	0	1,815	1,815	(256)	1,559
Balance (in shares) at Sep. 30, 2024	3,287,647	611,784
Balance at Sep. 30, 2024	$ 33	$ 6	59,206	(20,714)	38,531	(872)	37,659
Balance (in shares) at Jun. 30, 2024	3,287,647	611,784
Balance at Jun. 30, 2024	$ 33	$ 6	59,206	(22,554)	36,691	(762)	35,929
Net income (loss)	$ 0	$ 0	0	1,840	1,840	(110)	1,730
Balance (in shares) at Sep. 30, 2024	3,287,647	611,784
Balance at Sep. 30, 2024	$ 33	$ 6	$ 59,206	$ (20,714)	$ 38,531	$ (872)	$ 37,659