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Deferred Income - Additional Information (Detail) - USD ($) | Dec. 31, 2021 | Dec. 31, 2020
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Deferred Revenue Arrangement [Line Items] |  |
Deferred revenue, current | $ 5,666,285 | $ 2,995,657
Time and Bareboat Deferred Revenue [Member] |  |
Deferred Revenue Arrangement [Line Items] |  |
Deferred revenue, current | $ 5,743,234 | $ 2,995,657

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