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Note 6 - Stock Based Compensation (Tables)
9 Months Ended
Sep. 30, 2024
Notes Tables  
Share-Based Payment Arrangement, Activity [Table Text Block]
  

Outstanding

  

Exercisable

 
  

Number of Options

  

Weighted Average Exercise Price

  

Number of Options

  

Weighted Average Exercise Price

 

Options outstanding and exercisable, December 31, 2022

  417  $5,744.82   250  $8,274.91 

Vested

        83   1,950.00 

Expired

  (167)  11,435.60   (167)  11,435.60 

Options outstanding and exercisable, December 31, 2023

  250   1,950.00   166   1,950.00 

Vested

        84   1,950.00 

Options outstanding and exercisable, September 30, 2024

  250  $1,950.00   250  $1,950.00