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Capital Commitments (Details) - Capital Commitments [Member] | Dec. 31, 2025 m² milliunits | Feb. 17, 2023 m² milliunits
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Capital Commitments [Line Items] |  |
Area of gardens | milliunits | 800 | 1,014
Area of land | m² | 533,334 | 676,000

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- Definition Area of land held. + References No definition available. + Details
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Namespace Prefix: | orhl_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Area of land held. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:areaItemType
Balance Type: | na
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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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_OtherCommitmentsAxis=orhl_CapitalCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |