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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, 2019 5,817,000          
Balances at Dec. 31, 2019 $ 10,753,000 $ 6,725,000 $ 8,555,000 $ 26,033,000 $ 5,778,000 $ 31,811,000
Stock-based compensation expense $ 0 56,000 0 56,000 0 56,000
Restricted common shares returned to the plan (in shares) (129,000)          
Restricted common shares returned to the plan $ 0 0 0 0 0 0
Cash distributions to non-controlling interests 0 0 0 0 (326,000) (326,000)
Net income (loss) $ 0 0 (135,000) (135,000) 67,000 (68,000)
Balances (in shares) at Mar. 31, 2020 5,688,000          
Balances at Mar. 31, 2020 $ 10,753,000 6,781,000 8,420,000 25,954,000 5,519,000 31,473,000
Balances (in shares) at Dec. 31, 2019 5,817,000          
Balances at Dec. 31, 2019 $ 10,753,000 6,725,000 8,555,000 26,033,000 5,778,000 31,811,000
Net income (loss)           (507,000)
Balances (in shares) at Jun. 30, 2020 5,691,000          
Balances at Jun. 30, 2020 $ 10,753,000 6,834,000 7,937,000 25,524,000 5,449,000 30,973,000
Balances (in shares) at Mar. 31, 2020 5,688,000          
Balances at Mar. 31, 2020 $ 10,753,000 6,781,000 8,420,000 25,954,000 5,519,000 31,473,000
Stock-based compensation expense 0 53,000 0 53,000 0 53,000
Cash distributions to non-controlling interests 0 0 0 0 (114,000) (114,000)
Net income (loss) $ 0 0 (483,000) (483,000) 44,000 (439,000)
Stock-based compensation expense (in shares) 3,000          
Balances (in shares) at Jun. 30, 2020 5,691,000          
Balances at Jun. 30, 2020 $ 10,753,000 6,834,000 7,937,000 25,524,000 5,449,000 $ 30,973,000
Balances (in shares) at Dec. 31, 2020 5,791,000         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 0 107,000 0 107,000 0 107,000
Net income (loss) $ 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         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 (loss)           $ 60,000
Options exercised (in shares)           22,000
Balances (in shares) at Jun. 30, 2021 5,868,000         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
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 0 96,000 0 96,000 0 96,000
Cash distributions to non-controlling interests 0 0 0 0 (204,000) (204,000)
Net income (loss) $ 0 0 (87,000) (87,000) 60,000 (27,000)
Stock-based compensation expense (in shares) 62,000          
Options exercised (in shares) 5,000          
Options exercised $ 5,000 0 0 5,000 0 $ 5,000
Balances (in shares) at Jun. 30, 2021 5,868,000         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