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Deferred Income - Additional Information (Detail) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
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