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Note 6 - Net Loss Per Share (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table Text Block]
   

Year ended December 31, 2019

   

Nine months ended December 31, 2018

 

Anti-dilutive securities:

               

Stock options

    2,629       2,869  

Restricted stock/Deferred stock units

    -       20  
      2,629       2,889