Represents per share increase in depreciation expense during the year.

No definition available.

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- Definition

The average inflation rate assumed for estimating the future maintenance and vessel operating expense for use in the impairment test of long lived assets.

+ References

No definition available.

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- Definition

Dry-docking and special survey cost amortization period in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- References

No definition available.

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- Definition

The annual contribution calculated on the total amount of foreign exchange annually imported and converted to Euros for the years 2012-2015.

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No definition available.

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- Definition

The profits tax rate in Hong Kong.

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No definition available.

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- References

No definition available.

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- References

No definition available.

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- Definition

The minimum percentage threshold of likelihood for realizing tax positions.

+ References

No definition available.

+ Details

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- Definition

Represents minimum percentages of shipping income would be treated as being domestic source income.

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No definition available.

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- Definition

The percentage of the value of the Company stock that is owned, directly or indirectly, by individuals who are residents of the Company's country of organization or of another foreign country that grants an equivalent exemption to corporations organized in the United States.

+ References

No definition available.

+ Details

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- Definition

The percentage of vote and value of the outstanding shares of a specific class owned, actually or constructively under specified stock attribution rules, on more than half the days during the taxable year.

+ References

No definition available.

+ Details

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- Definition

Period of forward freight agreements expressed in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Period within which historical charter rates available for each type of vessel in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

The percentage of personal ownership in the value of a specific class of the Company's outstanding stock.

+ References

No definition available.

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Data Type:	num:percentItemType
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Period Type:	instant

- Definition

Tax rate applied by the tax authorities on US source shipping income.

+ References

No definition available.

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Period Type:	instant

- Definition

The estimated tax expense not recorded by the company due to tax exemption.

+ References

No definition available.

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- References

No definition available.

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- Definition

Refers to the balance of transfers from vessels remeasurement.

+ References

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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- References

No definition available.

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- Definition

Amount of increase (decrease) in accumulated depreciation, depletion and amortization of property, plant and equipment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

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- Definition

A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.4)
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Balance Type:	credit
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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

The aggregate amount of write-downs for impairments recognized during the period for long-lived assets held for abandonment, exchange or sale.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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- Definition

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.

+ References

No definition available.

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- References

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

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Significant Accounting Policies - 20F (Details) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($)	Sep. 30, 2015	Dec. 31, 2015 USD ($) Segment $ / shares	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Accounts Receivable Trade, Net [Abstract]
Provision for doubtful accounts	$ 43		$ 43	$ 13
Impairment of Long-Lived Assets (Vessels) [Abstract]
Period of forward freight agreements			2 years
Period within which historical charter rates available for each type of vessel			10 years
Annual inflation rate assumed for asset impairment			2.00%
Impairment loss for vessels			$ 0	0	$ 3,564
Income Taxes [Abstract]
Minimum percentage for recognition of income tax position			50.00%
Hong Kong tax rate			16.50%
Foreign exchange tax			$ 32
Minimum stock ownership percentage for tax exemption	50.00%		50.00%
Minimum vote and value percentage of regularly traded stock	50.00%		50.00%
Significant shareholder percentage	5.00%		5.00%
Minimum percentages of shipping income would be treated as being United States source income			50.00%
Tax rate on US source shipping income	2.00%		2.00%
Unrecognized tax expense for tax exempt entity			$ 0	$ 0	25
Segment Reporting [Abstract]
Number of reportable segments \| Segment			1
Salvage Value Change [Member]
Asset Depreciation, Salvage Value and Estimated Useful Life [Abstract]
Increase in depreciation expense			$ 235
Increase in depreciation expense (in dollars per share) \| $ / shares			$ 0.02
Estimated Useful Life Change [Member]
Asset Depreciation, Salvage Value and Estimated Useful Life [Abstract]
Increase in depreciation expense			$ 289
Increase in depreciation expense (in dollars per share) \| $ / shares			$ 0.03
Computer Software and Hardware [Member]
Asset Depreciation, Salvage Value and Estimated Useful Life [Abstract]
Estimated useful life of property and equipment			3 years
Vessel [Member]
Asset Depreciation, Salvage Value and Estimated Useful Life [Abstract]
Estimated useful life of property and equipment	25 years	30 years
African Oryx [Member]
Vessels Held for Sale [Abstract]
Impairment loss					867
Vessels Davakis G. and Delos Ranger [Member]
Vessels Held for Sale [Abstract]
Impairment loss					10,697
Vessels remeasurement					7,000
UOB Vessels [Member]
Vessels Held for Sale [Abstract]
Vessels remeasurement					$ 1,000
Minimum [Member]
Dry-Docking and Special Survey Costs [Abstract]
Dry-docking and special survey cost amortization period			2 years
Maximum [Member]
Dry-Docking and Special Survey Costs [Abstract]
Dry-docking and special survey cost amortization period			3 years