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Note 12 - Accrued Charter Revenue, Current and Non-current and Unearned Revenue, Current and Non-current - Schedule of Unearned Revenue (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Unearned Revenue	$ 32,035	$ 36,156
Less current portion	(17,087)	(19,668)
Non-current portion	14,948	16,488
Unearned Revenues Regarding Hires Collected in Advance [Member]
Unearned Revenue	5,143	7,924
Unearned Revenues Regarding Net Deferred Gains [Member]
Unearned Revenue	4,461
Unearned Revenues Regarding Charter Revenues Resulting from Varying Charter Rates [Member]
Unearned Revenue	$ 22,431	$ 28,232

X

- Definition

Amount of deferred revenue as of balance sheet date. Deferred revenue represents collections of cash or other assets related to a revenue producing activity for which revenue has not yet been recognized. Generally, an entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP.

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