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Capital Stock and Changes in Capital Accounts (Narrative stocks) (Details)
 6 Months Ended
Jun. 09, 2023
USD ($)
$ / shares
Mar. 20, 2023
USD ($)
$ / shares
Jan. 30, 2023
USD ($)
$ / shares
shares
Jun. 30, 2023
USD ($)
shares
$ / shares
Jun. 30, 2022
USD ($)
shares
May 26, 2023
USD ($)
$ / shares
Dec. 31, 2022
$ / shares
shares
Jun. 22, 2021
Item
Class Of Stock [Line Items]                
Cash dividends on preferred stock | $       $ 2,884,000 $ 2,884,000      
Payments for repurchase of common stock | $       0 928,000      
Dividend paid on common stock per share | $ / shares   $ 0.15            
Cash dividend | $   $ 15,965,000     38,839,000      
Dividends on Common Stock (Note 8(f)) | $       31,931,000        
Dividends Paid-in-kind | $ $ 10,761,000              
Issuance of stock | $         4,980,000      
Dividends Paid-in-kind, per share | $ / shares $ 0.10              
Issuance of Common Stock, shares (Notes 8(e))     2,033,613          
Series B Preferred Stock [Member]                
Class Of Stock [Line Items]                
Cash dividends on preferred stock | $       2,884,000 $ 2,884,000      
Series D Preferred Stock [Member] | Mrs. Semiramis Paliou                
Class Of Stock [Line Items]                
Cash dividends on preferred stock | $       $ 0        
Preferred Stock [Member]                
Class Of Stock [Line Items]                
Preferred stock, Shares authorized       25,000,000     25,000,000  
Preferred stock, Par value per share | $ / 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 per share | $ / 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 per share | $ / 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 100,000 votes, on all matters submitted to a vote of the shareholders of the Company, subject to a maximum number of votes eligible to be cast by such holder derived from the Series D Preferred Shares and any other voting security of the Company held by the holder to be equal to the lesser of (i) 36% of the total number of votes entitled to vote on any matter put to shareholders of the Company and (ii) the sum of the holder’s aggregate voting power derived from securities other than the Series D Preferred Stock and 15% of the total number of votes entitled to be cast on matters put to shareholders of the Company.        
Preferred stock number of voting rights | Item               100,000
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 put to shareholders       15.00%        
Common Stock [Member]                
Class Of Stock [Line Items]                
Issuance of new shares         820,000      
Shares issued price per share | $ / shares     $ 3.84          
Stock repurchased shares         191,055      
Proceeds from issuance of stock, net of expenses | $     $ 0          
Issuance of stock | $         $ 8,000      
Issuance of Common Stock, shares (Notes 8(e))     2,033,613 2,033,613        
Dividends payable amount per share | $ / shares           $ 0.15    
Dividends payable | $           $ 15,965,000