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, 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	0	0	3	0	3	0	3
Net income (loss)	$ 0	$ 0	0	(1,248)	(1,248)	(29)	(1,277)
Balance (in shares) at Jun. 30, 2020	3,263,647	611,784
Balance at Jun. 30, 2020	$ 33	$ 6	59,150	(23,404)	35,785	(95)	35,690
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
Stock options - compensation costs	0	0	2	0	2	0	2
Net income (loss)	$ 0	$ 0	0	(435)	(435)	(12)	(447)
Balance (in shares) at Jun. 30, 2020	3,263,647	611,784
Balance at Jun. 30, 2020	$ 33	$ 6	59,150	(23,404)	35,785	(95)	35,690
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	0	0	3	0	3	0	3
Net income (loss)	$ 0	$ 0	0	1,458	1,458	(46)	1,412
Balance (in shares) at Jun. 30, 2021	3,287,647	611,784
Balance at Jun. 30, 2021	$ 33	$ 6	59,199	(20,684)	38,554	(172)	38,382
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
Stock options - compensation costs	0	0	2	0	2	0	2
Net income (loss)	$ 0	$ 0	0	742	742	(18)	724
Balance (in shares) at Jun. 30, 2021	3,287,647	611,784
Balance at Jun. 30, 2021	$ 33	$ 6	$ 59,199	$ (20,684)	$ 38,554	$ (172)	$ 38,382