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Transactions with Related Parties - Statements of Operations (Table) (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Related Party Transaction [Line Items]
Consultancy fees	$ (327)	$ (328)
General and administrative expenses	(14,991)	(17,062)
Management fees	(9,202)	(8,188)
Charter - in hire expenses	(14,053)	(44,442)
Interchart [Member]
Related Party Transaction [Line Items]
Voyage expenses	(1,890)	(1,950)
Directors [Member]
Related Party Transaction [Line Items]
Compensation	(87)	(87)
Combine Marine Ltd. and Alma Properties [Member]
Related Party Transaction [Line Items]
Office rent	(19)	(9)
Oceanbulk Maritime and its affiliates [Member]
Related Party Transaction [Line Items]
General and administrative expenses	(143)	(78)
Augustea Technoservices Ltd. [Member]
Related Party Transaction [Line Items]
Management fees	(3,276)	(3,254)
Songa Shipmanagement Ltd. [Member]
Related Party Transaction [Line Items]
Management fees	0	(32)
AOM [Member]
Related Party Transaction [Line Items]
Charter - in hire expenses	(1,654)	0
Sydelle [Member]
Related Party Transaction [Line Items]
Charter - in hire expenses	(540)	0
Coromel Maritime Limited [Member]
Related Party Transaction [Line Items]
Charter - in hire expenses	$ (249)	$ 0

X

- Definition

The fees related to receiving management consultancy services during the reporting period.

+ References

No definition available.

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- Definition

Expenditures for compensation for non executive officers.Examples include, but not limited to, Board of Director's attendance fees.

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- Definition

The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.4)
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- Definition

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

+ References

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- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 4
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- Definition

Direct costs arising from transactions with related parties who are not affiliates or joint Ventures. These costs are categorized as cost of goods sold.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
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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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