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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 |

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