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Condensed 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             337,000 337,000
Other comprehensive loss           (13,000)   (13,000)
Amortization of stock based compensation         8,000     8,000
Cash dividends             (233,000) (233,000)
Balance at Mar. 31, 2021 $ 5,000   $ 1,000   11,079,000 (79,000) 2,335,000 13,341,000
Balance (in Shares) at Mar. 31, 2021 5,062,235   762,612          
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          
Other comprehensive loss               (25,000)
Balance at Sep. 30, 2021 $ 5,000   $ 1,000   11,150,000 (91,000) 3,135,000 14,200,000
Balance (in Shares) at Sep. 30, 2021 5,103,568   762,612          
Balance at Mar. 31, 2021 $ 5,000   $ 1,000   11,079,000 (79,000) 2,335,000 13,341,000
Balance (in Shares) at Mar. 31, 2021 5,062,235   762,612          
Consolidated net income             590,000 590,000
Other comprehensive loss           (3,000)   (3,000)
Exercise stock options         46,000     46,000
Exercise stock options (in Shares) 31,333              
Amortization of stock based compensation         6,000     6,000
Cash dividends             (233,000) (233,000)
Balance at Jun. 30, 2021 $ 5,000   $ 1,000   11,131,000 (82,000) 2,692,000 13,747,000
Balance (in Shares) at Jun. 30, 2021 5,093,568   762,612          
Consolidated net income             678,000 678,000
Other comprehensive loss           (9,000)   (9,000)
Exercise stock options         10,000     10,000
Exercise stock options (in Shares) 10,000              
Amortization of stock based compensation         9,000     9,000
Cash dividends             (235,000) (235,000)
Balance at Sep. 30, 2021 $ 5,000   $ 1,000   11,150,000 (91,000) 3,135,000 14,200,000
Balance (in Shares) at Sep. 30, 2021 5,103,568   762,612          
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             2,042,000 2,042,000
Other comprehensive loss           (17,000)   (17,000)
Amortization of stock based compensation         5,000     5,000
Cash dividends             (264,000) (264,000)
Balance at Mar. 31, 2022 $ 5,000   $ 1,000   11,181,000 (90,000) 5,054,000 16,151,000
Balance (in Shares) at Mar. 31, 2022 5,113,568   762,612          
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        
Other comprehensive loss               $ 15,000
Exercise stock options (in Shares)               120,000
Balance at Sep. 30, 2022 $ 5,000   $ 1,000   11,402,000 (58,000) 5,011,000 $ 16,361,000
Balance (in Shares) at Sep. 30, 2022 5,233,568 5,233,568 762,612 762,612        
Balance at Mar. 31, 2022 $ 5,000   $ 1,000   11,181,000 (90,000) 5,054,000 16,151,000
Balance (in Shares) at Mar. 31, 2022 5,113,568   762,612          
Consolidated net income             613,000 613,000
Other comprehensive loss           12,000   12,000
Exercise stock options         208,000     208,000
Exercise stock options (in Shares) 120,000              
Amortization of stock based compensation         6,000     6,000
Cash dividends             (870,000) (870,000)
Balance at Jun. 30, 2022 $ 5,000   $ 1,000   11,395,000 (78,000) 4,797,000 16,120,000
Balance (in Shares) at Jun. 30, 2022 5,233,568   762,612          
Consolidated net income             484,000 484,000
Other comprehensive loss           20,000   20,000
Amortization of stock based compensation         7,000     7,000
Cash dividends             (270,000) (270,000)
Balance at Sep. 30, 2022 $ 5,000   $ 1,000   $ 11,402,000 $ (58,000) $ 5,011,000 $ 16,361,000
Balance (in Shares) at Sep. 30, 2022 5,233,568 5,233,568 762,612 762,612