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Capital Stock and Changes in Capital Accounts, Series D Preferred Stock (Details)
$ / shares in Units, $ in Thousands
 12 Months Ended
Sep. 11, 2024
USD ($)
$ / shares
shares
Oct. 17, 2023
shares
Jun. 09, 2023
USD ($)
$ / shares
shares
Feb. 08, 2023
USD ($)
$ / shares
shares
Dec. 15, 2022
USD ($)
$ / shares
shares
Sep. 21, 2022
USD ($)
$ / shares
shares
Sep. 20, 2022
USD ($)
shares
Dec. 31, 2024
USD ($)
Dividend
$ / shares
shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Dec. 31, 2022
USD ($)
shares
Nov. 29, 2021
$ / shares
Preferred Stock [Abstract]                      
Threshold beneficial ownership percentage               49.00%      
Preferred stock, par value (in dollars per share) | $ / shares               $ 0.01 $ 0.01   $ 0.01
Preferred stock, shares issued (in shares)               533,136 520,459    
Preferred stock, shares outstanding (in shares)               533,136 520,459    
DSI [Member]                      
Preferred Stock [Abstract]                      
Number of special stock dividends declared | Dividend               2      
Series D Preferred Stock [Member]                      
Preferred Stock [Abstract]                      
Preferred stock, liquidation preference (in dollars per share) | $ / shares       $ 1,000   $ 1,000   $ 1,000      
Preferred stock, dividend rate               7.00%      
Consecutive trading day period               10 days      
Preferred stock, par value (in dollars per share) | $ / shares       0.01   0.01   $ 0.01 $ 0.01    
Preferred stock, stated value (in dollars per share) | $ / shares       $ 1,000   $ 1,000          
Preferred stock, aggregate liquidation preference | $       $ 13,157   $ 25,000          
Shares redeemed (in shares)               97      
Deemed dividend upon redemption of preferred stock | $     $ 154   $ 134     $ 26 $ 154 $ 134  
Deemed dividend per share upon redemption of preferred stock (in dollars per share) | $ / shares     $ 0.0779   $ 0.0372            
Preferred stock, shares issued (in shares)               23,083 13,738    
Preferred stock, shares outstanding (in shares)               23,083 13,738    
Series D Preferred Stock [Member] | M/T Zeze Start [Member]                      
Preferred Stock [Abstract]                      
Preferred stock, liquidation preference (in dollars per share) | $ / shares $ 1,000                    
Shares issued (in shares) 9,442                    
Preferred stock, par value (in dollars per share) | $ / shares $ 0.01                    
Preferred stock, stated value (in dollars per share) | $ / shares $ 1,000                    
Preferred stock, aggregate liquidation preference | $ $ 9,442                    
Series D Preferred Stock [Member] | DSI [Member]                      
Preferred Stock [Abstract]                      
Shares redeemed (in shares)     8,590   15,828            
Shares distributed (in shares)     4,567   9,172            
Series D Preferred Stock [Member] | Related Party [Member]                      
Preferred Stock [Abstract]                      
Shares redeemed (in shares)               97 1    
Series D Preferred Stock [Member] | Related Party [Member] | DSI [Member]                      
Preferred Stock [Abstract]                      
Shares issued (in shares)       13,157   25,000 25,000        
Fair value of stock issued | $       $ 10,000     $ 17,600        
Series D Preferred Stock [Member] | Level 1 [Member] | Related Party [Member] | DSI [Member]                      
Preferred Stock [Abstract]                      
Fair value of stock issued | $     $ 6,683   $ 11,277            
Common Stock [Member]                      
Preferred Stock [Abstract]                      
Shares issued (in shares)                 615,000 6,407  
Shares issued upon redemption of preferred stock (in shares)               56,381      
Common Stock [Member] | DSI [Member]                      
Preferred Stock [Abstract]                      
Shares issued upon redemption of preferred stock (in shares)     1,977,106   360,055            
Common Stock [Member] | Related Party [Member]                      
Preferred Stock [Abstract]                      
Shares issued upon redemption of preferred stock (in shares)               56,381 385    
Common Stock [Member] | Related Party [Member] | DSI [Member]                      
Preferred Stock [Abstract]                      
Shares issued upon redemption of preferred stock (in shares)   3,649,474                  
Common Stock [Member] | Series D Preferred Stock [Member]                      
Preferred Stock [Abstract]                      
Shares issued upon redemption of preferred stock (in shares)                 1,977,491 360,055  
Preferred Stock [Member] | Series D Preferred Stock [Member]                      
Preferred Stock [Abstract]                      
Shares issued (in shares)               9,442 13,157 25,000  
Shares redeemed (in shares)               97 8,591 15,828