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Basis of Presentation and General Information (Details) $ in Thousands | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 20, 2016 | Dec. 31, 2017 USD ($) | Dec. 31, 2014 | Jul. 11, 2014
Vessels [Line Items] |  |  |  |
Date of Incorporation |  | Dec. 13, 2006 |  |
Maximum |  |  |  |
Vessels [Line Items] |  |  |  |
Effect of the adoption of ASU on voyage revenues |  | 1.00% |  |
Reverse stock split |  |  |  |
Vessels [Line Items] |  |  |  |
Reverse stock split, Conversion ratio | 5 |  |  |
Vessels in operation | Oceanbulk | Excel Maritime Carriers Ltd. |  |  |  |
Vessels [Line Items] |  |  |  |
Number of vessels acquired |  |  | 49 |
Vessels under construction | Oceanbulk |  |  |  |
Vessels [Line Items] |  |  |  |
Number of contracts for Newbuildings acquired |  |  |  | 26
Charterer A |  |  |  |
Vessels [Line Items] |  |  |  |
Accounts receivable |  | $ 1,969 |  |

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