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Note O - Stock Options - Options Outstanding and Exercisable (Details)
 12 Months Ended
Dec. 31, 2024
$ / shares
shares
Range of exercise prices, lower range (in dollars per share) $ 93.6
Range of exercise prices, upper range (in dollars per share) $ 504
Options outstanding (in shares) | shares 3,007
Options exercisable (in shares) | shares 3,007
Options exercisable, weighted average exercise price (in dollars per share) $ 197.31
Exercise Price Range 1 [Member]  
Range of exercise prices, lower range (in dollars per share) 93.6
Range of exercise prices, upper range (in dollars per share) $ 169.92
Options outstanding (in shares) | shares 1,857
Options outstanding, weighted average exercise price (in dollars per share) $ 144.71
Options outstanding, weighted average remaining remaining life (Year) 1 year 8 months 1 day
Options exercisable (in shares) | shares 1,857
Options exercisable, weighted average exercise price (in dollars per share) $ 144.71
Exercise Price Range 2 [Member]  
Range of exercise prices, lower range (in dollars per share) 169.93
Range of exercise prices, upper range (in dollars per share) $ 504
Options outstanding (in shares) | shares 1,150
Options outstanding, weighted average exercise price (in dollars per share) $ 282.24
Options outstanding, weighted average remaining remaining life (Year) 2 months 19 days
Options exercisable (in shares) | shares 1,150
Options exercisable, weighted average exercise price (in dollars per share) $ 282.24