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Transactions with related parties - DSI (Details) $ in Thousands | Nov. 29, 2021 USD ($) subsidiary shares | Nov. 29, 2021 USD ($) shares | Nov. 29, 2021 USD ($) item shares | Nov. 29, 2021 USD ($) Vote shares | Nov. 08, 2021 subsidiary | Nov. 08, 2021 | Nov. 08, 2021 item | Jun. 30, 2022 USD ($) shares | Dec. 31, 2021 USD ($) shares | Nov. 03, 2021 shares
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Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued |  |  |  |  |  |  |  | 510,000 | 510,000 |
Due from a related party (Note 3(c)) | $ |  |  |  |  |  |  |  | $ 70 | $ 70 |
Series B Preferred Stock |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued | 500,000 | 500,000 | 500,000 | 500,000 |  |  |  |  | 500,000 |
Number of votes | Vote |  |  |  | 2,000 |  |  |  |  |  |
Percentage of the total number of votes |  | 34.00% |  |  |  |  |  |  |  |
Maximum percentage of total number of votes entitled to vote including common stock or any other voting security |  | 49.00% |  |  |  |  |  |  |  |
Preferred stock Series C |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Preferred stock, shares issued | 10,000 | 10,000 | 10,000 | 10,000 |  |  |  | 10,000 | 10,000 |
Diana Shipping Inc |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Number of vessel-owning subsidiaries contributed | 3 | 3 |  |  |  |  |  |  |  |
Working capital contributed | $ | $ 1,000 | $ 1,000 | $ 1,000 | $ 1,000 |  |  |  |  |  |
Percentage of the total number of votes |  | 34.00% |  |  |  |  |  |  |  |
Right of first refusal over number of drybulk carriers |  |  |  |  |  | 6 | 6 |  |  |
Aggregate fair value of vessels | $ | $ 46,040 | $ 46,040 | $ 46,040 | 46,040 |  |  |  |  |  |
Number Of Vessels Contributed to the Entity | 3 |  | 3 |  |  |  |  |  |  |
Economic interest of preferred share | $ | $ 0 | 0 | $ 0 | 0 |  |  |  |  |  |
Preferred share recorded at par | $ | 5 | 5 | 5 | 5 |  |  |  |  |  |
Due from a related party (Note 3(c)) | $ | $ 70 | $ 70 | $ 70 | $ 70 |  |  |  | $ 70 | $ 70 |
Diana Shipping Inc | Minimum |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Number of vessels the entity has the right, but not the obligation, to purchase |  |  |  |  | 1 | 1 |  |  |  |
Diana Shipping Inc | Maximum [Member] |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Number of vessels the entity has the right, but not the obligation, to purchase |  |  |  |  | 6 | 6 |  |  |  |
Diana Shipping Inc | Common stock |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Share exchange ratio | 10 | 10 | 10 | 10 |  |  |  |  |  |
Number of shares distributed | 8,820,240 | 8,820,240 | 8,820,240 | 8,820,240 |  |  |  |  |  |
Number of shares owned |  |  |  |  |  |  |  |  |  | 8,820,240
Diana Shipping Inc | Series B Preferred Stock |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares distributed | 0 | 0 | 0 | 0 |  |  |  |  |  |
Preferred stock, shares issued | 500,000 | 500,000 | 500,000 | 500,000 |  |  |  |  |  |
Number of votes | Vote |  |  |  | 2,000 |  |  |  |  |  |
Maximum percentage of total number of votes entitled to vote including common stock or any other voting security |  | 49.00% |  |  |  |  |  |  |  |
Diana Shipping Inc | Preferred stock Series C |  |  |  |  |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |  |  |  |  |
Number of shares distributed | 10,000 | 10,000 | 10,000 | 10,000 |  |  |  |  |  |
Preferred stock, shares issued | 10,000 | 10,000 | 10,000 | 10,000 |  |  |  |  |  |
Preferred share recorded at stated value | $ | $ 1,000 | $ 1,000 | $ 1,000 | $ 1,000 |  |  |  |  |  |
Preferred share recorded at fair value | $ | $ 7,570 | $ 7,570 | $ 7,570 | $ 7,570 |  |  |  |  |  |

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