v3.26.3
Equity method investments, Equity Method Investments Developed (Details) - USD ($)
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Equity Method Investments [Abstract]    
Beginning balance $ 50,045,840  
Acquisitions 3,150,494 $ 24,119,428
Equity method result (864,264) $ 441,493
Distributions (5,702,697)  
Transfers / Other 1,282,957  
Net exchange differences during the period (1,644,014)  
Ending balance 46,268,316  
Rio Jul Beteiligungs GmbH & Co. KG, Hamburg [Member]    
Equity Method Investments [Abstract]    
Beginning balance 3,679,487  
Distributions (2,806,526)  
Ending balance 0  
Rio Kobe Beteiligungsgesellschaft mbH & Co. KG, Hamburg [Member]    
Equity Method Investments [Abstract]    
Distributions (1,080,654)  
Topeka MPC Maritime AS, Oslo / Norway [Member]    
Equity Method Investments [Abstract]    
Distributions $ (1,815,517)