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Basis of Presentation and General Information - Risk Concentration (Table) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Voyage revenues
Concentration Risk [Line Items]
Concentration of Risk	10.00%
Charterer A
Concentration Risk [Line Items]
Concentration of Risk	15.00%
Accounts receivable	$ 1,367
Charterer B
Concentration Risk [Line Items]
Concentration of Risk		14.00%	13.00%

X

- Definition

For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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