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Merger and Issuance of Common Stock to Terra Offshore REIT - Narratives - Mergers (Details) - $ / shares | Mar. 01, 2020 | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Business Acquisition |  |  |
Common Stock, Par Value |  | $ 0.01 | $ 0.01
Terra Fund 7 |  |  |
Business Acquisition |  |  |
Common Stock, Par Value | $ 0.01 |  |
Terra PropertyTrust |  |  |
Business Acquisition |  |  |
Common Stock, Par Value | 0.01 |  |
Terra Property Trust 2 Inc |  |  |
Business Acquisition |  |  |
Common Stock, Par Value | 0.01 |  |
Terra Property Trust 2 Inc | Common Stock |  |  |
Business Acquisition |  |  |
Business Acquisition Share Conversion Rate | $ 1.2031 |  |
Terra Fund 7 |  |  |
Business Acquisition |  |  |
Business Combination Common Stock Shares | 2,116,785.76 |  |

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