v3.26.3
Equity Method Investments, Ownership Interests and Carrying Amount (Details) - USD ($)
Jun. 30, 2026
Dec. 31, 2025
Equity Method Investments [Abstract]    
Carrying amount $ 46,268,316 $ 50,045,840
Fair value $ 234,269,389 $ 139,745,917
Wilhelmsen Ahrenkiel Ship Management GmbH & Co. KG [Member]    
Equity Method Investments [Abstract]    
Ownership interest 50.00% 50.00%
Carrying amount $ 18,951,538 $ 20,249,258
BB Amstel B.V. [Member]    
Equity Method Investments [Abstract]    
Ownership interest 41.50% 41.50%
Carrying amount $ 8,067,680 $ 8,348,495
MPC Caribbean Clean Energy Limited, Barbados [Member]    
Equity Method Investments [Abstract]    
Ownership interest 22.20% 22.20%
Carrying amount $ 5,227,063 $ 5,466,198
Barber Ship Management Germany GmbH & Co. KG [Member]    
Equity Method Investments [Abstract]    
Ownership interest 50.00% 50.00%
Carrying amount $ 3,941,425 $ 4,111,977
BestShip GmbH & Cie, KG [Member]    
Equity Method Investments [Abstract]    
Ownership interest 50.00% 50.00%
Carrying amount $ 4,022,830 $ 3,712,538
Rio Jul Beteiligungs GmbH & Co. KG, Hamburg [Member]    
Equity Method Investments [Abstract]    
Ownership interest   39.30%
Carrying amount $ 0 $ 3,679,487
MPC Storm Maritime Opportunities GmbH & Co. KG [Member]    
Equity Method Investments [Abstract]    
Ownership interest 21.40%  
Carrying amount $ 3,055,431 0
Other [Member]    
Equity Method Investments [Abstract]    
Carrying amount [1] $ 3,002,349 $ 4,477,887
Other [Member] | Minimum [Member]    
Equity Method Investments [Abstract]    
Ownership interest 25.10% 25.50%
Other [Member] | Maximum [Member]    
Equity Method Investments [Abstract]    
Ownership interest 50.00% 50.00%
MPC Container Ships ASA [Member]    
Equity Method Investments [Abstract]    
Ownership interest 20.10% 17.14%
Fair value $ 227,922,012 $ 133,674,134
MPC Energy Solutions N.V. [Member]    
Equity Method Investments [Abstract]    
Ownership interest 20.50% 20.50%
Fair value $ 6,347,377 $ 6,071,783
[1] As at June 30, 2026, these investments represent ownership interests ranging from approximately 25.1% to 50.0% (December 31, 2025: 25.5% to 50.0%) in entities engaged primarily in holding and investing in maritime assets, including equity interests in vessel-owning companies. The entities are located in Germany and Norway.