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	4	0	4	0	4
Net income (loss)	0	0	0	(467)	(467)	(37)	(504)
Net income (loss)	$ 0	$ 0	0	(467)	(467)	(37)	(504)
Balance (in shares) at Sep. 30, 2020	3,263,647	611,784
Balance at Sep. 30, 2020	$ 33	$ 6	59,151	(22,623)	36,567	(103)	36,464
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
Stock options - compensation costs	0	0	1	0	1	0	1
Net income (loss)	0	0	0	781	781	(8)	773
Net income (loss)	$ 0	$ 0	0	781	781	(8)	773
Balance (in shares) at Sep. 30, 2020	3,263,647	611,784
Balance at Sep. 30, 2020	$ 33	$ 6	59,151	(22,623)	36,567	(103)	36,464
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	4	0	4	0	4
Investment in subsidiary from accredited investor	0	0	0	0	0	358	358
Net income (loss)	0	0	0	2,441	2,441	(214)	2,227
Net income (loss)	$ 0	$ 0	0	2,441	2,441	(214)	2,227
Balance (in shares) at Sep. 30, 2021	3,287,647	611,784
Balance at Sep. 30, 2021	$ 33	$ 6	59,200	(19,701)	39,538	18	39,556
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
Stock options - compensation costs	0	0	1	0	1	0	1
Investment in subsidiary from accredited investor	0	0	0	0	0	358	358
Net income (loss)	0	0	0	983	983	(168)	815
Net income (loss)	$ 0	$ 0	0	983	983	(168)	815
Balance (in shares) at Sep. 30, 2021	3,287,647	611,784
Balance at Sep. 30, 2021	$ 33	$ 6	$ 59,200	$ (19,701)	$ 39,538	$ 18	$ 39,556