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Note 8 - Investment in Joint Ventures - Carrying Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Carrying value $ 79,615 $ 73,012
CETS [Member]    
Carrying value 77,797 70,696
PVD-Expro [Member]    
Carrying value $ 1,818 $ 2,316