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Capital Stock and Changes in Capital Accounts (Narrative stocks) (Details)
 6 Months Ended 12 Months Ended
Jun. 18, 2024
USD ($)
$ / shares
Mar. 12, 2024
USD ($)
$ / shares
Jan. 30, 2023
USD ($)
$ / shares
shares
Jun. 30, 2024
USD ($)
shares
$ / shares
Jun. 30, 2023
USD ($)
shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Jun. 22, 2021
Item
Class Of Stock [Line Items]              
Cash dividends on preferred stock | $       $ 2,884,000 $ 2,884,000    
Dividend paid on common stock per share | $ / shares $ 0.075 $ 0.075          
Cash dividend | $ $ 9,379,000 $ 8,989,000   18,368,000 31,931,000    
Dividends Paid-in-kind | $         10,761,000    
Issuance of Common Stock | $       27,792,000 7,733,000    
Warrants, fair value | $       9,286,000   $ 6,332,000  
Gain (loss) on warrants | $       $ 6,773,000 0    
If All Warrants Are Exercised [Member]              
Class Of Stock [Line Items]              
Issuance of new shares       35,434,896      
Issuance of Common Stock | $       $ 101,327,000      
Proceeds from warrant exercises | $       90,452,000      
Series B Preferred Stock [Member]              
Class Of Stock [Line Items]              
Cash dividends on preferred stock | $       $ 2,884,000 $ 2,884,000    
Preferred Stock [Member]              
Class Of Stock [Line Items]              
Preferred stock, shares authorized       50,000,000   50,000,000  
Preferred stock, par value | $ / shares       $ 0.01   $ 0.01  
Preferred Stock [Member] | Series A Participating Preferred Stock              
Class Of Stock [Line Items]              
Preferred stock, shares authorized       1,000,000   1,000,000  
Issuance of preferred stock, shares       0   0  
Preferred stock, shares outstanding       0   0  
Preferred Stock [Member] | Series B Preferred Stock [Member]              
Class Of Stock [Line Items]              
Preferred stock, shares authorized       5,000,000   5,000,000  
Preferred stock, par value | $ / shares       $ 0.01   $ 0.01  
Issuance of preferred stock, shares       2,600,000   2,600,000  
Preferred stock, shares outstanding       2,600,000   2,600,000  
Shares issued price per share | $ / shares       $ 25.00   $ 25.00  
Preferred stock liquidation preference per share | $ / shares       $ 25.00   $ 25.00  
Preferred stock voting rights       Holders of Series B Preferred Shares have no voting rights other than the ability, subject to certain exceptions, to elect one director if dividends for six quarterly dividend periods (whether or not consecutive) are in arrears and certain other limited protective voting rights.      
Preferred stock dividend rate percentage       8.875%      
Preferred stock dividend rate per dollar amount | $ / shares       $ 2.21875      
Preferred stock, redemption price per share | $ / shares       $ 25.00      
Preferred Stock [Member] | Series C Preferred Stock [Member]              
Class Of Stock [Line Items]              
Preferred stock, shares authorized       10,675   10,675  
Issuance of preferred stock, shares       10,675   10,675  
Preferred stock, shares outstanding       10,675   10,675  
Shares issued price per share | $ / shares       $ 0.01   $ 0.01  
Preferred stock voting rights       The Series C Preferred Stock votes with the common shares of the Company, and each share entitles the holder thereof to 1,000 votes on all matters submitted to a vote of the shareholders of the Company.      
Preferred stock number of voting rights       1,000      
Preferred Stock [Member] | Series D Preferred Stock [Member]              
Class Of Stock [Line Items]              
Preferred stock, shares authorized       400   400  
Preferred Stock [Member] | Series D Preferred Stock [Member] | Mrs. Semiramis Paliou              
Class Of Stock [Line Items]              
Preferred stock, par value | $ / shares       $ 0.01   $ 0.01  
Issuance of preferred stock, shares       400   400  
Preferred stock, shares outstanding       400   400  
Preferred stock voting rights       The Series D Preferred Stock vote with the common shares of the Company, and each share of the Series D Preferred Stock entitles the holder thereof to up to 200,000 votes,      
Cash dividends on preferred stock | $       $ 0      
Preferred stock number of voting rights | Item             200,000
Percent of total number of votes entitled to vote on any matter put to shareholders       36.00%      
Percent of total number of votes entitled to be cast on matters out to shareholders       36.00%      
Common Stock [Member]              
Class Of Stock [Line Items]              
Issuance of new shares       9,723,506 2,033,613    
Shares issued price per share | $ / shares     $ 3.84 $ 2.86      
Proceeds from issuance of stock, net of expenses | $     $ 0        
Issuance of Common Stock | $       $ 97,000 $ 20,000    
Issuance of common stock, shares     2,033,613        
Number of warrants exercised           6,321,891  
Proceeds from warrant exercises | $           $ 14,681,000