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Note 5 - Stock-Based Compensation (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Share-Based Payment Arrangement, Activity [Table Text Block]
  

Three Months Ended September 30,

  

Nine Months Ended September 30,

 
  

2022

  

2021

  

2022

  

2021

 
  

(Unaudited - In thousands)

 

General and administrative expense

 $560  $484  $1,136  $1,469 
  $560  $484  $1,136  $1,469