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Transactions with Related Parties, Steamship Shipbroking Enterprises Inc. (Details) - USD ($)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Transactions with Related Parties [Abstract]      
Equity method investment $ 2,970,000 $ 1,645,000  
Due to related parties 458,000 474,000  
Related Party [Member] | Steamship [Member]      
Transactions with Related Parties [Abstract]      
Accrued performance bonus 225,000    
Due to related parties 436,000 462,000  
Related Party [Member] | Steamship [Member] | General and Administration Expenses [Member]      
Transactions with Related Parties [Abstract]      
Accrued performance bonus 225,000 230,000 $ 185,000
Related Party [Member] | Steamship [Member] | Insurance and Administrative Management Fees [Member] | Management Fees to Related Parties [Member]      
Transactions with Related Parties [Abstract]      
Fees charged by related party 149,000 150,000 141,000
Related Party [Member] | Steamship [Member] | Insurance-Related Services [Member]      
Transactions with Related Parties [Abstract]      
Monthly management fee per vessel employed or available for employment 500    
Monthly management fee per vessel laid-up and not available for employment $ 250    
Minimum period vessel is laid-up and not available for employment 15 days    
Notice period to terminate agreement 3 months    
Related Party [Member] | Steamship [Member] | Administrative Services [Member]      
Transactions with Related Parties [Abstract]      
Notice period to terminate agreement 30 days    
Monthly fee $ 10,000    
Term of agreement 12 months    
Renewal term of agreement 12 months    
Related Party [Member] | Steamship [Member] | Brokerage Services [Member]      
Transactions with Related Parties [Abstract]      
Percentage fee on hire agreed per charter party for each vessel 2.50%    
Monthly fee $ 150,000   95,000
Term of agreement 12 months    
Renewal term of agreement 1 year    
Fees charged by related party $ 2,686,000 2,266,000 1,614,000
Equity method investment 150,000    
Related Party [Member] | Steamship [Member] | Brokerage Services [Member] | General and Administration Expenses [Member]      
Transactions with Related Parties [Abstract]      
Fees charged by related party 1,800,000 1,800,000 1,140,000
Related Party [Member] | Steamship [Member] | Brokerage Services [Member] | Voyage Expenses [Member]      
Transactions with Related Parties [Abstract]      
Fees charged by related party 612,000 466,000 474,000
Related Party [Member] | Steamship [Member] | Brokerage Services [Member] | Loss on Sale of Vessel [Member]      
Transactions with Related Parties [Abstract]      
Fees charged by related party $ 274,000 $ 0 $ 0