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Subsequent Events (Narrative) (Details)
3 Months Ended 12 Months Ended
Mar. 06, 2024
EUR (€)
Feb. 15, 2024
USD ($)
Feb. 08, 2024
USD ($)
Item
Jan. 24, 2024
EUR (€)
Jan. 18, 2024
EUR (€)
Jan. 15, 2024
USD ($)
$ / shares
Feb. 14, 2023
USD ($)
Apr. 01, 2024
USD ($)
shares
Dec. 31, 2023
USD ($)
shares
Dec. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Feb. 23, 2024
$ / shares
Feb. 22, 2024
USD ($)
Jan. 19, 2024
USD ($)
Oct. 05, 2023
USD ($)
Feb. 01, 2023
USD ($)
Jan. 23, 2023
USD ($)
Subsequent Event [Line Items]                                  
Number of warrants exercised | shares                 0                
Proceeds from warrant exercises                   $ 0              
Sale price of vessel                             $ 17,998,000 $ 14,000,000 $ 15,080,000
Additions in property and equipment                 $ 2,006,000 667,000 $ 1,600,000            
Payments to acquire interest joint venture                 $ 0 $ 0 $ 375,000            
Ultramax [Member]                                  
Subsequent Event [Line Items]                                  
Purchase price of vessel acquired             $ 27,900,000                    
Subsequent Events.                                  
Subsequent Event [Line Items]                                  
Number of warrants exercised | shares               3,051,471                  
Issuance of new shares | shares               4,597,192                  
Proceeds from warrant exercises               $ 12,206,000                  
Payment to acquire plot of land | € € 1,300,000       € 310,000,000                        
Number of vessels in agreement to acquire | Item     2                            
Percent of paid in advance of purchase price   17.50%                              
Dividends payable amount per share | $ / shares                       $ 0.075          
Commitment amount     $ 46,000,000                            
Purchase price of vessels   $ 8,050,000                              
Subsequent Events. | Diana Energize [Member]                                  
Subsequent Event [Line Items]                                  
Payments to acquire interest joint venture | €       € 50,000,000                          
Ownership interest percent       45.87%                          
Subsequent Events. | Artemis [Member]                                  
Subsequent Event [Line Items]                                  
Sale price of vessel                           $ 12,990,000      
Subsequent Events. | Houston [Member]                                  
Subsequent Event [Line Items]                                  
Sale price of vessel                         $ 23,300,000        
Series B Preferred Stock [Member] | Subsequent Events.                                  
Subsequent Event [Line Items]                                  
Preferred Stock, Dividends per share | $ / shares           $ 0.5546875                      
Dividends, Preferred Stock           $ 1,442,000