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CONDENSED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($)
Preferred Stock
Series I, Class B
Preferred Stock
Series II, Class B
Preferred Stock
Series III Class B
Preferred Stock
Series IV Preferred Stock
Preferred Stock
Series V Preferred Stock
Additional Paid-in Capital
Retained Earnings/Accumulated Deficit
Treasury Stock
Total
Balance at Dec. 31, 2019 $ 96,000 $ 171,200 $ 129,245 $ 342,500 $ 34,000 $ 61,660,744 $ (33,891,234)   $ 28,542,455
Increase (Decrease) in Stockholders' Equity                  
Exchange of Preferred Stock for Common Stock     (2,500) (7,500)   (90,000)     (100,000)
Stock Option Exercises           626,687     626,687
Dividends           (109,600)     (109,600)
Net income             4,088,886   4,088,886
Balance at Jun. 30, 2020 96,000 171,200 126,745 335,000 34,000 62,087,831 (29,802,348)   33,048,428
Balance at Mar. 31, 2020 96,000 171,200 126,745 337,500 34,000 61,538,444 (33,568,461)   28,735,428
Increase (Decrease) in Stockholders' Equity                  
Exchange of Preferred Stock for Common Stock       (2,500)   (22,500)     (25,000)
Stock Option Exercises           626,687     626,687
Dividends           (54,800)     (54,800)
Net income             3,766,113   3,766,113
Balance at Jun. 30, 2020 $ 96,000 171,200 126,745 $ 335,000 $ 34,000 62,087,831 (29,802,348)   33,048,428
Balance at Dec. 31, 2020   156,200 106,745     59,285,401 (9,668,221)   49,880,125
Increase (Decrease) in Stockholders' Equity                  
Conversion of Preferred Stock into Common Stock     (26,500)     26,500      
Stock Option Exercises           48,600     48,600
Dividends             (5,095,996)   (5,095,996)
Stock option compensation           1,345,916     1,345,916
Repurchase of common stock, at cost               $ 154,424 154,424
Net income             28,618,009   28,618,009
Balance at Jun. 30, 2021   156,200 80,245     60,706,417 13,853,792 (154,424) 74,642,230
Balance at Mar. 31, 2021   156,200 101,745     59,333,751 8,248,613   67,840,309
Increase (Decrease) in Stockholders' Equity                  
Conversion of Preferred Stock into Common Stock     (21,500)     21,500      
Stock Option Exercises           5,250     5,250
Dividends             (5,056,946)   (5,056,946)
Stock option compensation           1,345,916     1,345,916
Repurchase of common stock, at cost               154,424 154,424
Net income             10,662,125   10,662,125
Balance at Jun. 30, 2021   $ 156,200 $ 80,245     $ 60,706,417 $ 13,853,792 $ (154,424) $ 74,642,230