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Vessels, Net - Summary of Vessels, Net (Detail) - USD ($)
 6 Months Ended 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]          
Vessel cost, Balance     $ 1,111,484,926 $ 1,087,601,983  
Vessel cost, Additions       44,894,678  
Vessel cost, Impairment loss     (169,553,060) (14,511,735)  
Vessel cost, Disposals     (8,100,000) (6,500,000)  
Vessel cost, Transfer from Advances for vessel under construction and acquisitions     30,366,897    
Vessel cost, Other additions     1,227,314    
Vessel cost, Transfer to Vessel held for sale     (12,250,000)    
Vessel cost, Spin-off of tankers     (80,500,000)    
Vessel cost, Balance $ 872,676,077 $ 1,111,484,926 872,676,077 1,111,484,926 $ 1,087,601,983
Accumulated Depreciation, Balance     (279,149,867) (252,449,580)  
Accumulated Depreciation, Impairment loss     124,936,846 10,654,428  
Accumulated Depreciation, Disposals     0 (100,378)  
Accumulated Depreciation, Depreciation for the year     (37,125,903) (37,455,093)  
Accumulated Depreciation, Balance (191,338,924) (279,149,867) (191,338,924) (279,149,867) (252,449,580)
Net Book Value, Balance     832,335,059 835,152,403  
Net Book Value, Additions       44,894,678  
Net Book Value, Impairment loss     (44,616,214) (3,857,307) (993,916)
Net Book Value, Disposals     (8,100,000) (6,399,622)  
Net Book Value, Transfer from Advances for vessel under construction and acquisitions     30,366,897    
Net Book Value, Other additions     1,227,314    
Net Book Value, Transfer to Vessel held for sale     (12,250,000)    
Net Book Value, Spin-off of tankers     (80,500,000)    
Net Book Value, Depreciation for the year (195,858) (170,884) (37,125,903) (37,455,093) (37,693,733)
Net Book Value, Balance $ 681,337,153 $ 832,335,059 $ 681,337,153 $ 832,335,059 $ 835,152,403