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Note 5 - Intangible Assets (Tables)
9 Months Ended
Sep. 30, 2021
Notes Tables  
Schedule of Finite-Lived Intangible Assets [Table Text Block]
  

September 30, 2021

  

December 31, 2020

 
  

Gross

          

Gross

         
  

Carrying

  

Accumulated

  

Net Book

  

Carrying

  

Accumulated

  

Net Book

 
  

Amount

  

Amortization

  

Value

  

Amount

  

Amortization

  

Value

 

Customer relationships

 $982  $(982) $  $982  $(911) $71