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Warrant liability - Narrative (Details) - USD ($) |  | 12 Months Ended
--- | --- | ---
Mar. 29, 2023 | Dec. 31, 2024 | Dec. 31, 2023
Class of Warrant or Right [Line Items] |  |  |
Change in fair value of warrant liabilities |  | $ (960,091) | $ 10,988,922
Private placement warrants |  |  |
Class of Warrant or Right [Line Items] |  |  |
Warrants forfeited (in shares) | 2,966,670 |  |
Change in fair value of warrant liabilities |  | 400,000 | (3,600,000)
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Number of Shares | 5,933,333 |  |
Public warrants |  |  |
Class of Warrant or Right [Line Items] |  |  |
Change in fair value of warrant liabilities |  | $ 600,000 | $ (7,400,000)

X
- Definition Represents the number of warrants forfeited. + References No definition available. + Details
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Namespace Prefix: | uhg_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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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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X
- Definition The number of shares that would be issued, determined under the conditions specified in the contract, if the settlement were to occur at the reporting date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481648/480-10-50-2 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |