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Note 7 - Net Income Loss 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

 

Net loss

  $ (5,395 )   $ (2,568 )

Weighted-average number of common shares—basic and diluted

    30,043,380       29,423,727  

Net loss per share—basic and diluted

  $ (0.18 )   $ (0.09 )