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Reverse Recapitalization - Components of outstanding shares of common stock (Details) - shares | 12 Months Ended |  |
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Dec. 31, 2023 | Mar. 31, 2024 | Dec. 31, 2022
Reverse Recapitalization |  |  |
Number of Basic Share issued at the Merger and Total Common Stock as of December 31, 2023 | 11,956,823 | 12,926,296 | 5,292,384
Class A Common Stock |  |  |
Reverse Recapitalization |  |  |
Number of Basic Share issued at the Merger and Total Common Stock as of December 31, 2023 | 11,956,823 |  | 5,292,384
Legacy SMAP | Class A Common Stock |  |  |
Reverse Recapitalization |  |  |
Class A Common Stock outstanding previous to the Merger | 5,184,944 |  |
Number of Shares issued at the date of the business combination | 3,691,679 |  |
Redemption of S M A P Class A previous to the Merger | (1,493,265) |  |
Legacy ICI | Class A Common Stock |  |  |
Reverse Recapitalization |  |  |
Class A Common Stock outstanding previous to the Merger | 8,265,144 |  |

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