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Deferred Income	12 Months Ended
	Dec. 31, 2018
Text Block [Abstract]
Deferred Income	9. Deferred Income The amounts shown in the accompanying consolidated balance sheets amounting to $4,366,091 and $5,191,654 represent cash related to time and bareboat charter revenues received in advance as of December 31, 2017 and as of December 31, 2018, respectively.

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Contract with customer liability.

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