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Note 11 - Income Taxes (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   

Three Months Ended March 31,

 
   

2020

   

2019

 

Income tax expense

  $ 18     $ 3  

Effective income tax rate

    25 %     (20 )%