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Organization and Nature of Business - Schedule of Summaries of Entities (Details) | 3 Months Ended
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Mar. 31, 2025
OSR Holdings, Inc. [Member] |
Schedule of Summaries of Entities [Line Items] |
OSR Holdings, Inc | Equity swap with shares of the Parent and OSR inc.’s share

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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 Individual, partnership, corporation, or other entity that is responsible for the day-to-day administration of the subsidiary of the limited liability company (LLC) or limited partnership (LP). May also include a description of the compensation or fee arrangements--such as incentive compensation--of the managing member or general partner as related to the performance of the subsidiary of the LLC or LP. + References No definition available. + Details
Name: | us-gaap_SubsidiaryOfLimitedLiabilityCompanyOrLimitedPartnershipManagingMemberOrGeneralPartner
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_OwnershipAxis=osrh_OSRHoldingsIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |