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Advances for Vessels Under Construction and Acquisitions - Summary of Advances for Vessels Under Construction and Acquisitions (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Investments in and Advances to Affiliates, Schedule of Investments [Abstract] |  |
Beginning balance |  | $ 61,577,818
Advances for vessels under construction and acquisitions | 2,891,283 | 102,597,821
Capitalized interest | 97,620 | 5,155,821
Vessels delivered |  | (169,331,460)
Ending balance | $ 2,988,903 |

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