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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]
Total
Balance at Dec. 31, 2020 $ 5,000   $ 1,000   $ 11,071,000 $ (66,000) $ 2,231,000 $ 13,242,000
Balance (in Shares) at Dec. 31, 2020 5,062,235   762,612          
Consolidated net income             2,010,000 2,010,000
Other comprehensive loss           (7,000)   (7,000)
Exercise stock options         76,000     $ 76,000
Exercise stock options (in Shares) 51,333             51,333
Amortization of stock based compensation         29,000     $ 29,000
Cash dividends   $ (837,000)   $ (126,000)     (965,000) (965,000)
Balance at Dec. 31, 2021 $ 5,000   $ 1,000   11,176,000 (73,000) 3,276,000 14,385,000
Balance (in Shares) at Dec. 31, 2021 5,113,568 5,113,568 762,612 762,612        
Consolidated net income             3,208,000 3,208,000
Other comprehensive loss           15,000   15,000
Exercise stock options         208,000     $ 208,000
Exercise stock options (in Shares) 120,000             120,000
Amortization of stock based compensation         23,000     $ 23,000
Cash dividends             (1,703,000) (1,703,000)
Balance at Dec. 31, 2022 $ 5,000   $ 1,000   $ 11,407,000 $ (58,000) $ 4,781,000 $ 16,136,000
Balance (in Shares) at Dec. 31, 2022 5,233,568 5,233,568 762,612 762,612