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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) | (307,500) |  | (2,513,248) |  |  | (2,823,248)
Conversion of Preferred Stock into Common Stock |  | (15,000) |  |  |  | 15,000 |  |  |
Stock Option Exercises |  |  |  |  |  | 851,012 |  |  | 851,012
Dividends |  |  |  |  |  | (161,842) |  |  | (161,842)
Net income |  |  |  |  |  |  | 12,714,637 |  | 12,714,637
Balance at Sep. 30, 2020 | 96,000 | 156,200 | 126,745 | 35,000 | 34,000 | 59,851,666 | (21,176,597) |  | 39,123,014
Balance at Jun. 30, 2020 | 96,000 | 171,200 | 126,745 | 335,000 | 34,000 | 62,087,831 | (29,802,348) |  | 33,048,428
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |
Exchange of Preferred Stock for Common Stock |  |  |  | (300,000) |  | (2,423,248) |  |  | (2,723,248)
Conversion of Preferred Stock into Common Stock |  | (15,000) |  |  |  | 15,000 |  |  |
Stock Option Exercises |  |  |  |  |  | 224,325 |  |  | 224,325
Dividends |  |  |  |  |  | (52,242) |  |  | (52,242)
Net income |  |  |  |  |  |  | 8,625,751 |  | 8,625,751
Balance at Sep. 30, 2020 | $ 96,000 | 156,200 | 126,745 | $ 35,000 | $ 34,000 | 59,851,666 | (21,176,597) |  | 39,123,014
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 |  |  |  |  |  |  | (5,135,046) |  | (5,135,046)
Stock option compensation |  |  |  |  |  | 2,503,152 |  |  | 2,503,152
Repurchase of Common Stock |  |  |  |  |  |  |  | $ (2,839,326) | (2,839,326)
Net income |  |  |  |  |  |  | 35,139,894 |  | 35,139,894
Balance at Sep. 30, 2021 |  | 156,200 | 80,245 |  |  | 61,863,653 | 20,336,627 | (2,839,326) | 79,597,399
Balance at Jun. 30, 2021 |  | 156,200 | 80,245 |  |  | 60,706,417 | 13,853,792 | (154,424) | 74,642,230
Increase (Decrease) in Stockholders' Equity |  |  |  |  |  |  |  |  |
Dividends |  |  |  |  |  |  | (39,050) |  | (39,050)
Stock option compensation |  |  |  |  |  | 1,157,236 |  |  | 1,157,236
Repurchase of Common Stock |  |  |  |  |  |  |  | (2,684,902) | (2,684,902)
Net income |  |  |  |  |  |  | 6,521,885 |  | 6,521,885
Balance at Sep. 30, 2021 |  | $ 156,200 | $ 80,245 |  |  | $ 61,863,653 | $ 20,336,627 | $ (2,839,326) | $ 79,597,399

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