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Long-Term Debt, net - Annual Loan Principal Payments (Table) (Details) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Disclosure of detailed information about borrowings [line items] |  |
Loan Balance | $ 39,416 | $ 41,660
HSH Bank |  |
Disclosure of detailed information about borrowings [line items] |  |
Loan Balance | 23,550 |
DVB Bank | Tranche (A) |  |
Disclosure of detailed information about borrowings [line items] |  |
Loan Balance | 7,940 |
DVB Bank | Tranche (B) |  |
Disclosure of detailed information about borrowings [line items] |  |
Loan Balance | 7,926 |
Not later than one year |  |
Disclosure of detailed information about borrowings [line items] |  |
Loan Balance | 18,640 |
Not later than one year | HSH Bank |  |
Disclosure of detailed information about borrowings [line items] |  |
Loan Balance | 2,774 |
Not later than one year | DVB Bank | Tranche (A) |  |
Disclosure of detailed information about borrowings [line items] |  |
Loan Balance | 7,940 |
Not later than one year | DVB Bank | Tranche (B) |  |
Disclosure of detailed information about borrowings [line items] |  |
Loan Balance | 7,926 |
Later than one year |  |
Disclosure of detailed information about borrowings [line items] |  |
Loan Balance | 20,776 |
Later than one year | HSH Bank |  |
Disclosure of detailed information about borrowings [line items] |  |
Loan Balance | 20,776 |
Later than one year | DVB Bank | Tranche (A) |  |
Disclosure of detailed information about borrowings [line items] |  |
Loan Balance | 0 |
Later than one year | DVB Bank | Tranche (B) |  |
Disclosure of detailed information about borrowings [line items] |  |
Loan Balance | $ 0 |

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