BALANCE SHEETS (Parenthetical) - USD ($)	Dec. 31, 2024	Dec. 31, 2023
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, issued shares	34,024,304	34,024,304
Common stock, outstanding shares	29,937,159	29,937,159
Common stock in treasury - at cost, shares	4,087,145	4,087,145
Preferred Stock Class B
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, authorized shares	5,000,000	5,000,000
Series II Class B
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, outstanding shares	156,200	156,200
Preferred stock, liquidation preference (in dollars)	$ 1,952,500	$ 1,952,500
Series III Class B
Preferred stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, outstanding shares	74,245	74,245
Preferred stock, liquidation preference (in dollars)	$ 928,063	$ 928,063