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Advances for Vessels Under Construction and Acquisitions - Additional Information (Detail) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Investments in and Advances to Affiliates [Line Items] |  |  |
Advances for vessels under construction and acquisitions |  | $ 61,577,818 | $ 55,785,801
Other Operating Income (Expense) [Member] |  |  |
Investments in and Advances to Affiliates [Line Items] |  |  |
Charges for postponement of vessel delivery | $ 146,667 | $ 863,333 |

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- Definition Advances for vessels under construction and acquisitions. + References No definition available. + Details
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- Definition Charges for postponement of vessel delivery. + References No definition available. + Details
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- Details
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