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Note 7 - Affiliates Balances - Balances with Unconsolidated Affiliates (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Due from related parties $ 21,191 $ 70,134
Due to related parties 21,191 61,555
Net due from affiliates 0 8,579
Sonatide [Member]    
Due from related parties 0 49,011
Due to related parties 0 40,432
DTDW [Member]    
Due from related parties 21,191 21,123
Due to related parties $ 21,191 $ 21,123