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Business and segmental reporting (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 Segment	Dec. 31, 2012	Dec. 31, 2011
Consolidated Revenues [Line Items]
Number of reportable segment	1
Revenues	$ 35,867,356	$ 25,172,654	$ 22,375,414
Navig8 Group [Member]
Consolidated Revenues [Line Items]
Revenues		16,336,503	17,183,539
Concentration risk percentage (in hundredths)	10.00%
Dampskibsselskabet Norden A/S [Member]
Consolidated Revenues [Line Items]
Revenues	5,145,075	5,022,559	5,191,875
Cargill International SA,Geneva [Member]
Consolidated Revenues [Line Items]
Revenues	8,119,657
Concentration risk percentage (in hundredths)		10.00%	10.00%
Itochu Enex Co., Ltd [Member]
Consolidated Revenues [Line Items]
Revenues	4,860,957
Concentration risk percentage (in hundredths)		10.00%	10.00%
Koch Shipping, Inc. [Member]
Consolidated Revenues [Line Items]
Revenues	4,360,159
Concentration risk percentage (in hundredths)		10.00%	10.00%
Womar Logistic Pte., Ltd [Member]
Consolidated Revenues [Line Items]
Revenues	$ 10,299,096
Concentration risk percentage (in hundredths)		10.00%	10.00%

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

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