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Warrant Liabilities - Summary of Fair Value of warrant liability (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Class of Warrant or Right [Line Items] |  |  |  |
Change/Decrease in fair value | $ (348) | $ 4,703 | $ 477 | $ 15,149
July 2023 Warrants |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Beginning balance |  |  | 1,169 |
Change/Decrease in fair value |  |  | (417) |
Ending balance | 752 |  | 752 |
September 2023 Warrants |  |  |  |
Class of Warrant or Right [Line Items] |  |  |  |
Beginning balance |  |  | 167 |
Change/Decrease in fair value |  |  | (60) |
Ending balance | $ 107 |  | $ 107 |

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- Definition Fair value of warrant liability. + References No definition available. + Details
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Namespace Prefix: | guts_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 25 -Paragraph 13 -SubTopic 10 -Topic 480 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481766/480-10-25-13 + Details
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- Details
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Namespace Prefix: |
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- Details
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