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Capital Stock and Changes in Capital Accounts, Series D Preferred Stock (Details) $ / shares in Units, $ in Thousands |  |  |  |  |  |  |  | 12 Months Ended |
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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 |

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