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CONDENSED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
Preferred Stock [Member]
Series II, Class B
Preferred Stock [Member]
Series III, Class B
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Treasury Stock [Member]
Total
Balance at Dec. 31, 2020 $ 156,200 $ 106,745 $ 59,285,401 $ (9,668,221)   $ 49,880,125
Increase (Decrease) in Stockholders' Equity            
Exchange of Preferred Stock for Common Stock   (5,000) 5,000      
Stock Option Exercises     43,350     43,350
Dividends     (39,050)     (39,050)
Net income       17,955,884   17,955,884
Balance at Mar. 31, 2021 156,200 101,745 59,294,701 8,287,663   67,840,309
Balance at Dec. 31, 2021 156,200 76,245 63,024,888 41,182,429 $ (5,270,501) 99,169,261
Increase (Decrease) in Stockholders' Equity            
Stock Option Exercises     10,500     $ 10,500
Stock Option Exercises (in shares)           10,000
Dividends       (58,111)   $ (58,111)
Stock option compensation     1,132,078     1,132,078
Repurchase of common stock, at cost         (2,547,724) (2,547,724)
Net income       7,616,455   7,616,455
Balance at Mar. 31, 2022 $ 156,200 $ 76,245 $ 64,167,466 $ 48,740,773 $ (7,818,225) $ 105,322,459