Condensed Consolidated Statements 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, 2019	3,263,647	611,784
Balance at Dec. 31, 2019	$ 33	$ 6	$ 59,147	$ (22,156)	$ 37,030	$ (66)	$ 36,964
Stock options - compensation costs			1		1		1
Net income (loss)				(813)	(813)	(17)	(830)
Balance (in shares) at Mar. 31, 2020	3,263,647	611,784
Balance at Mar. 31, 2020	$ 33	$ 6	59,148	(22,969)	36,218	(83)	36,135
Balance (in shares) at Dec. 31, 2020	3,287,647	611,784
Balance at Dec. 31, 2020	$ 33	$ 6	59,196	(22,142)	37,093	(126)	36,967
Stock options - compensation costs			1		1		1
Net income (loss)				716	716	(28)	688
Balance (in shares) at Mar. 31, 2021	3,287,647	611,784
Balance at Mar. 31, 2021	$ 33	$ 6	$ 59,197	$ (21,426)	$ 37,810	$ (154)	$ 37,656