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Note P - Equity - Summary of Warrant Activity (Details) - $ / shares
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Outstanding, warrants (in shares) 270,672 260,525  
Outstanding, weighted average exercise price, warrants (in dollars per share) $ 104.95 $ 106.42  
Outstanding, weighted average remaining contractual life, warrants (Year) 4 years 4 months 13 days 2 years 7 months 2 days 3 years 5 months 23 days
Granted, warrants (in shares) 2,534,148 11,112  
Granted, weighted average exercise price, warrants (in dollars per share) $ 3.15 $ 54  
Exercised, warrants (in shares) 177,890 0  
Exercised, weighted average exercise price, warrants (in dollars per share) $ 0.0018 $ 0  
Forfeited, warrants (in shares) 0 0  
Forfeited, weighted average exercise price, warrants (in dollars per share) $ 0 $ 0  
Expired, warrants (in shares) (438) (965)  
Expired, weighted average exercise price, warrants (in dollars per share) $ 0 $ 518.4  
Granted (in dollars per share) $ 3.15 $ 54  
Exercised, warrants (in shares) (177,890) (0)  
Exercised (in dollars per share) $ 0.0018 $ 0  
Outstanding, warrants (in shares) 2,626,492 270,672 260,525
Outstanding, weighted average exercise price, warrants (in dollars per share) $ 19.09 $ 104.95 $ 106.42