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Note 8 - Investment in Joint Ventures (Tables)
9 Months Ended
Sep. 30, 2022
Notes Tables  
Equity Method Investments [Table Text Block]
  

September 30,

  

December 31,

 
  

2022

  

2021

 

CETS

 $61,127  $54,014 

PVD-Expro

  3,618   3,590 

Total

 $64,745  $57,604