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Note 4(b) - Vessels, Net - Delivery of Vessels (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Yard Installments | $ 75,318 | $ 184,366
Capitalized Expenses | 1,641 | 4,854
Final Carrying Amount | 76,959 | 189,220
M/T Eco California [Member] |  |
Yard Installments |  | 34,313
Capitalized Expenses |  | 1,270
Final Carrying Amount |  | 35,583
M/T Eco Marina Del Ray [Member] |  |
Yard Installments |  | 35,787
Capitalized Expenses |  | 1,066
Final Carrying Amount |  | 36,853
M/T Eco Bel Air [Member] |  |
Yard Installments |  | 57,133
Capitalized Expenses |  | 1,209
Final Carrying Amount |  | 58,342
M/T Eco Beverly Hills [Member] |  |
Yard Installments |  | 57,133
Capitalized Expenses |  | 1,309
Final Carrying Amount |  | $ 58,442
M/T Eco Los Angeles [Member] |  |
Yard Installments | 37,659 |
Capitalized Expenses | 835 |
Final Carrying Amount | 38,494 |
M/T Eco City of Angels [Member] |  |
Yard Installments | 37,659 |
Capitalized Expenses | 806 |
Final Carrying Amount | $ 38,465 |

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