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Note 11 - Taxes (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Summary of Income Tax Examinations [Table Text Block]
  

Earliest Exam Year

Taxing Authority Jurisdiction:

  

U.S. Federal

 

2017

China 2017

Various U.S. States

 

2016

Puerto Rico (U.S. Territory)

 

2015

Canada

 

2015

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
  

Three Months Ended

  

Nine Months Ended

 
  

September 30,

  

September 30,

 
  

2021

  

2020

  

2021

  

2020

 

Effective Tax Rate

  23.2

%

  20.7

%

  23.0

%

  20.6

%