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Merger - Narrative (Details) - Old Cartesian - USD ($) $ in Millions |  |  | 2 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Dec. 05, 2023 | Nov. 13, 2023 | Dec. 31, 2023 | Dec. 31, 2023
Business Acquisition [Line Items] |  |  |  |
Percentage acquired |  | 100.00% |  |
Revenues |  |  | $ 0.0 |
Net loss |  |  | $ 1.6 |
Transaction costs |  |  |  | $ 4.9
Common stock |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Issuance of shares (in shares) | 224,099 | 224,099 |  |
Preferred Stock |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Issuance of shares (in shares) | 384,930.724 |  |  |
Preferred Stock | Series A Preferred Stock |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Issuance of shares (in shares) |  | 384,930.724 |  |

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