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Long-term Debt (Narrative III)) (Details) - USD ($)
6 Months Ended
Oct. 18, 2024
Apr. 19, 2023
Jan. 04, 2017
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Jul. 06, 2023
Jun. 26, 2023
Apr. 12, 2023
Debt Instrument [Line Items]                  
Gain/(loss) from interest rate swap       $ (227,000) $ 361,000        
Export-Import Bank of China [Member] | Secured Debt [Member]                  
Debt Instrument [Line Items]                  
Proceeds from issuance of secured debt     $ 57,240,000            
Periodic payment, principal       $ 954,000          
Maturity date       Jan. 04, 2032          
DNB Bank ASA [Member] | Secured Debt [Member]                  
Debt Instrument [Line Items]                  
Periodic payment, principal       $ 3,846,000          
Maturity date       Dec. 27, 2029          
Notional amount, percent of loan             30.00%    
Interest rate swap, fair value       $ 391,000   $ 165,000      
Gain/(loss) from interest rate swap       $ (227,000) $ 361,000        
Loan amount               $ 100,000,000  
Danish Ship Finance A/S [Member]                  
Debt Instrument [Line Items]                  
Proceeds from issuance of secured debt   $ 100,000,000              
Periodic payment, principal $ 2,533,000 3,301,000              
Balloon installments $ 14,323,000 $ 33,972,000              
Maturity date Apr. 18, 2031                
Loan amount                 $ 100,000,000