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Note 4(b) - Vessels, Net - Summary of Vessels (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Balance, cost | $ 189,220 |  |
Balance, Net Book Value | 366,842 |  |
Depreciation | (13,174) | $ (12,392) | $ (6,390)
Balance, cost | 76,959 | 189,220 |
Balance, Net Book Value | 213,716 | 366,842 |
Vessels [Member] |  |  |
Balance, cost | 372,543 | 196,784 |
Balance, Accumulated Depreciation | (18,597) | (16,149) |
Balance, Net Book Value | 353,946 | 180,635 |
— Transferred from advances for vessels acquisitions / under construction | 76,959 | 189,220 |
— Acquisitions |  | 51,940 |
— Impairment |  | (22,254) |
— Impairment |  | 9,944 |
— Impairment |  | (12,310) |
— Transferred to Assets held for sale |  | (43,147) |
Depreciation | (13,174) | (12,392) |
— Disposals, cost | (303,157) |  |
— Disposals, Accumulated Depreciation | 21,718 |  |
— Disposals (see Note 19) | (281,439) |  |
Balance, cost | 146,345 | 372,543 | 196,784
Balance, Accumulated Depreciation | (10,053) | (18,597) | (16,149)
Balance, Net Book Value | $ 136,292 | $ 353,946 | $ 180,635

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