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Note 6 - Net Income (Loss) Per Share (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
  

Year Ended December 31,

 
  

2022

  

2021

 

Shares used in basic earnings per share calculation

  40,305   40,719 

Effect of dilutive securities:

        

Stock options

  -   367 

Total effects of dilutive securities

  -   367 

Shares used in dilutive earnings per share calculation

  40,305   41,086 
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
  

Year Ended December 31,

 
  

2022

  

2021

 

Anti-dilutive securities

        

Stock options

  2,533   79 
   2,533   79