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Note 7 - Affiliates Balances - Balances with Unconsolidated Affiliates (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Due from related parties | $ 68,217 | $ 62,050
Due to related parties | 59,571 | 53,194
Net due from affiliates | 8,646 | 8,856
Sonatide [Member] |  |
Due from related parties | 47,251 | 41,623
Due to related parties | 38,605 | 32,767
DTDW [Member] |  |
Due from related parties | 20,966 | 20,427
Due to related parties | $ 20,966 | $ 20,427

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