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Consolidated Statements of Shareholders' Equity - USD ($)
Common Class A [Member]
Common Stock [Member]
Common Class A [Member]
Common Class B [Member]
Common Stock [Member]
Common Class B [Member]
Additional Paid-in Capital [Member]
AOCI Attributable to Parent [Member]
Retained Earnings [Member]
Noncontrolling Interest [Member]
Parent [Member]
Total
Balance at Dec. 31, 2019 $ 5,000   $ 1,000   $ 10,959,000 $ 38,000 $ 1,712,000 $ 100,000 $ 12,815,000 $ 12,715,000
Balance (in Shares) at Dec. 31, 2019 4,990,235   762,612              
Consolidated net income             1,359,000 $ (100,000) 1,259,000 1,359,000
Other comprehensive loss           (104,000)     (104,000) (104,000)
Exercise stock options         85,000       85,000 $ 85,000
Exercise stock options (in Shares) 72,000                 72,000
Amortization of stock based compensation         27,000       27,000 $ 27,000
Cash dividends   $ (730,000)   $ (111,000)     (840,000)   (840,000) (840,000)
Balance at Dec. 31, 2020 $ 5,000   $ 1,000   11,071,000 (66,000) 2,231,000   13,242,000 13,242,000
Balance (in Shares) at Dec. 31, 2020 5,062,235 5,062,235 762,612 762,612            
Consolidated net income             2,010,000   2,010,000 2,010,000
Other comprehensive loss           (7,000)     (7,000) (7,000)
Exercise stock options         76,000       76,000 $ 76,000
Exercise stock options (in Shares) 51,333                 51,333
Amortization of stock based compensation         29,000       29,000 $ 29,000
Cash dividends   $ (837,000)   $ (126,000)     (965,000)   (965,000) (965,000)
Balance at Dec. 31, 2021 $ 5,000   $ 1,000   $ 11,176,000 $ (73,000) $ 3,276,000   $ 14,385,000 $ 14,385,000
Balance (in Shares) at Dec. 31, 2021 5,113,568 5,113,568 762,612 762,612