Condensed Consolidated Statement of Shareholders' Equity (Unaudited) - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Parent [Member]	Noncontrolling Interest [Member]	Total
Balances (in shares) at Dec. 31, 2020	5,791,000
Balances at Dec. 31, 2020	$ 10,753,000	$ 7,024,000	$ 1,497,000	$ 19,274,000	$ 4,376,000	$ 23,650,000
Stock-based compensation expense (in shares)	10,000
Stock-based compensation expense	$ 0	107,000	0	107,000	0	107,000
Net income	$ 0	0	29,000	29,000	58,000	87,000
Balances (in shares) at Mar. 31, 2021	5,801,000
Balances at Mar. 31, 2021	$ 10,753,000	7,131,000	1,526,000	19,410,000	4,434,000	23,844,000
Balances (in shares) at Dec. 31, 2020	5,791,000
Balances at Dec. 31, 2020	$ 10,753,000	7,024,000	1,497,000	19,274,000	4,376,000	23,650,000
Net income						$ 228,000
Options exercised (in shares)						22,000
Balances (in shares) at Sep. 30, 2021	5,868,000
Balances at Sep. 30, 2021	$ 10,758,000	7,336,000	1,472,000	19,566,000	4,387,000	$ 23,953,000
Balances (in shares) at Mar. 31, 2021	5,801,000
Balances at Mar. 31, 2021	$ 10,753,000	7,131,000	1,526,000	19,410,000	4,434,000	23,844,000
Stock-based compensation expense (in shares)	62,000
Stock-based compensation expense	$ 0	96,000	0	96,000	0	96,000
Net income	$ 0	0	(87,000)	(87,000)	60,000	(27,000)
Options exercised (in shares)	5,000
Options exercised	$ 5,000	0	0	5,000	0	5,000
Cash distributions to non-controlling interests	$ 0	0	0	0	(204,000)	(204,000)
Balances (in shares) at Jun. 30, 2021	5,868,000
Balances at Jun. 30, 2021	$ 10,758,000	7,227,000	1,439,000	19,424,000	4,290,000	23,714,000
Stock-based compensation expense (in shares)	0
Stock-based compensation expense	$ 0	109,000	0	109,000	0	109,000
Net income	0	0	33,000	33,000	135,000	168,000
Cash distributions to non-controlling interests	$ 0	0	0	0	(38,000)	(38,000)
Balances (in shares) at Sep. 30, 2021	5,868,000
Balances at Sep. 30, 2021	$ 10,758,000	7,336,000	1,472,000	19,566,000	4,387,000	$ 23,953,000
Balances (in shares) at Dec. 31, 2021	6,049,000					6,049,000
Balances at Dec. 31, 2021	$ 10,758,000	7,444,000	1,691,000	19,893,000	4,346,000	$ 24,239,000
Stock-based compensation expense (in shares)	30,000
Stock-based compensation expense	$ 0	87,000	0	87,000	0	87,000
Net income	$ 0	0	269,000	269,000	125,000	394,000
Balances (in shares) at Mar. 31, 2022	6,079,000
Balances at Mar. 31, 2022	$ 10,758,000	7,531,000	1,960,000	20,249,000	4,471,000	$ 24,720,000
Balances (in shares) at Dec. 31, 2021	6,049,000					6,049,000
Balances at Dec. 31, 2021	$ 10,758,000	7,444,000	1,691,000	19,893,000	4,346,000	$ 24,239,000
Net income						$ 1,242,000
Options exercised (in shares)						2,000
Balances (in shares) at Sep. 30, 2022	6,153,000					6,153,000
Balances at Sep. 30, 2022	$ 10,763,000	7,679,000	2,773,000	21,215,000	4,212,000	$ 25,427,000
Balances (in shares) at Mar. 31, 2022	6,079,000
Balances at Mar. 31, 2022	$ 10,758,000	7,531,000	1,960,000	20,249,000	4,471,000	24,720,000
Stock-based compensation expense (in shares)	31,000
Stock-based compensation expense	$ 0	72,000	0	72,000	0	72,000
Net income	$ 0	0	497,000	497,000	43,000	540,000
Options exercised (in shares)	2,000
Options exercised	$ 5,000	0	0	5,000	0	5,000
Balances (in shares) at Jun. 30, 2022	6,112,000
Balances at Jun. 30, 2022	$ 10,763,000	7,603,000	2,457,000	20,823,000	4,514,000	25,337,000
Stock-based compensation expense (in shares)	30,000
Stock-based compensation expense	$ 0	76,000	0	76,000	0	76,000
Net income	0	0	316,000	316,000	(8,000)	308,000
Cash distributions to non-controlling interests	$ 0	0	0	0	(294,000)	(294,000)
Vested restricted stock awards (in shares)	11,000
Vested restricted stock awards	$ 0	0	0	0	0	$ 0
Balances (in shares) at Sep. 30, 2022	6,153,000					6,153,000
Balances at Sep. 30, 2022	$ 10,763,000	$ 7,679,000	$ 2,773,000	$ 21,215,000	$ 4,212,000	$ 25,427,000