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CONDENSED BALANCE SHEETS (Parenthetical) - $ / shares | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Preferred stock, par value (in dollars per share) | $ 1 | $ 1
Common stock, par value (in dollars per share) | $ 0 | $ 0
Common Stock, authorized shares | 100,000,000 | 100,000,000
Common Stock, outstanding shares | 33,764,283 | 33,957,204
Preferred Class B |  |
Preferred Stock, Shares Authorized | 5,000,000 | 5,000,000
Series II, Class B |  |
Preferred Stock, outstanding shares | 156,200 | 156,200
Series III Class B |  |
Preferred Stock, outstanding shares | 80,245 | 106,745

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