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Equity method investments, Ownership Interests and Carrying Amount (Details) - USD ($)
1 Months Ended 12 Months Ended
Dec. 31, 2024
Feb. 28, 2025
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Equity Method Investments [Abstract]          
Carrying amount $ 50,503,722   $ 50,045,840 $ 50,503,722 $ 0
Carrying amount 115,455,048   139,745,917 115,455,048 0
Underlying equity in net assets 27,866,771   26,179,744 27,866,771  
Decrease in equity method investments due to amortization of goodwill 0   1,004,500    
Equity method investments at fair value, difference between carrying amount and underlying equity $ 22,636,951   23,866,096 22,636,951  
Acquisition of equity method investments     26,180,269 0 0
Net loss     (326,123) 0 0
Distributions amount     $ 17,967,315 $ 4,209,527 $ 0
Wilhelmsen Ahrenkiel Ship Management GmbH & Co. KG [Member]          
Equity Method Investments [Abstract]          
Ownership interest 50.00%   50.00% 50.00%  
Carrying amount $ 17,808,231   $ 20,249,258 $ 17,808,231  
Underlying equity in net assets $ 7,686,171   $ 9,332,103 $ 7,686,171  
BB Amstel B.V. [Member]          
Equity Method Investments [Abstract]          
Ownership interest 41.50%   41.50% 41.50%  
Carrying amount $ 7,443,176   $ 8,348,495 $ 7,443,176  
Underlying equity in net assets $ 2,523,638   $ 2,850,130 $ 2,523,638  
MPC Caribbean Clean Energy Limited, Barbados [Member]          
Equity Method Investments [Abstract]          
Ownership interest 22.20%   22.20% 22.20%  
Carrying amount $ 5,032,570   $ 5,466,198 $ 5,032,570  
Underlying equity in net assets $ 2,843,300   $ 2,998,449 $ 2,843,300  
Barber Ship Management Germany GmbH & Co. KG [Member]          
Equity Method Investments [Abstract]          
Ownership interest 50.00%   50.00% 50.00%  
Carrying amount $ 3,922,745   $ 4,111,977 $ 3,922,745  
Underlying equity in net assets 1,484,997   $ 1,488,460 1,484,997  
BestShip GmbH & Cie, KG [Member]          
Equity Method Investments [Abstract]          
Ownership interest     50.00%    
Carrying amount 0   $ 3,712,538 0  
Underlying equity in net assets $ 0   $ 3,794,977 $ 0  
Rio Jul Beteiligungs GmbH & Co. KG, Hamburg [Member]          
Equity Method Investments [Abstract]          
Ownership interest 39.30%   39.30% 39.30%  
Carrying amount $ 4,162,422   $ 3,679,487 $ 4,162,422  
Underlying equity in net assets 1,740,912   1,193,321 1,740,912  
Other [Member]          
Equity Method Investments [Abstract]          
Carrying amount [1] 12,134,578   4,477,887 12,134,578  
Underlying equity in net assets [1] $ 11,587,753   4,522,304 $ 11,587,753  
Equity method investments decrease due to distributions and transfers     $ 7,656,691    
Other [Member] | Minimum [Member]          
Equity Method Investments [Abstract]          
Ownership interest 20.50%   25.00% 20.50%  
Other [Member] | Maximum [Member]          
Equity Method Investments [Abstract]          
Ownership interest 50.00%   50.00% 50.00%  
MPC Container Ships ASA [Member]          
Equity Method Investments [Abstract]          
Ownership interest 13.70%   17.14% 13.70%  
Carrying amount $ 111,586,255   $ 133,674,134 $ 111,586,255  
Net gain       2,537,974  
Net loss     (12,509,543)    
Distributions amount     $ 17,967,315 $ 4,209,527  
MPC Energy Solutions NV [Member]          
Equity Method Investments [Abstract]          
Ownership interest 20.50%   20.50% 20.50%  
Carrying amount $ 3,868,793   $ 6,071,783 $ 3,868,793  
Net gain     1,754,208 $ 149,261  
MPC Capital [Member] | BestShip GmbH & Cie, KG [Member]          
Equity Method Investments [Abstract]          
Percentage of shares acquired   50.00%      
Acquisition of equity method investments   $ 2,595,745 $ 2,595,745    
MPCC CSI LTD [Member] | MPC Container Ships ASA [Member]          
Equity Method Investments [Abstract]          
Ownership interest 16.68%   20.12% 16.68%  
Percentage of shares acquired     3.44%    
Acquisition of equity method investments     $ 23,584,524    
Shares held (in shares)     89,260,056    
[1] As at December 31, 2025, these investments represent ownership interests ranging from approximately 25.0% to 50.0% (December 31, 2024: 20.5% to 50%) in entities engaged primarily in holding and investing in maritime assets, including equity interest in vessel-owning companies. The entities are located in Germany and Norway.