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Senior Secured Notes Payable (Details) - USD ($) $ in Thousands |  |  | 1 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2025 | Jun. 11, 2025 | Sep. 30, 2025 | Sep. 30, 2025 | Sep. 30, 2024
Debt Instrument [Line Items] |  |  |  |  |
Proceeds from initial draw |  |  |  | $ 90,000 | $ 0
Senior Secured Notes due June 11, 2030 | Senior Notes | Sachem Capital Corporation Holdings, LLC |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Principal amount |  | $ 100,000 |  |  |
Proceeds from initial draw |  | $ 50,000 | $ 40,000 |  |
Proceeds from future draws | $ 10,000 |  |  |  |
Fixed annual rate |  | 9.875% |  |  |
Commitment fee percentage |  | 1.00% |  |  |
Original issue discount |  | $ 1,500 |  |  |
Deferred financing costs |  | $ 3,600 |  |  |
Term of debt (in years) |  | 5 years |  |  |
Deferred financing costs, remainder of fiscal year |  | $ 164 |  |  |
Deferred financing costs, year one |  | 609 |  |  |
Deferred financing costs, year two |  | 718 |  |  |
Deferred financing costs, year three |  | 804 |  |  |
Deferred financing costs, year four |  | 894 |  |  |
Deferred financing costs, year five |  | $ 401 |  |  |
Prepayment term |  | 3 years |  |  |
Prepayment, percentage of outstanding principal |  | 101.00% |  |  |

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