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Note 4 - Basic and Diluted Net Income Per Share (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]
  

Three Months Ended

 
  

March 31,

 
  

2022

  

2021

 

Weighted average common shares outstanding, basic

  5,590   5,537 

Dilutive common equivalent shares

  56   107 

Weighted average common shares outstanding, diluted

  5,646   5,644