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Note 8 - Investment in Joint Ventures (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Equity Method Investments [Table Text Block]
  

December 31,

  

2022

 

2021

CETS

 $62,471 $54,014

PVD-Expro

 3,567 3,590

Total

 $66,038 $57,604