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Other Financial Assets - Schedule of Other Financial Assets (Details) - USD ($) | Mar. 31, 2025 | Dec. 31, 2024
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Schedule of Other Financial Assets [Abstract] |  |
Leasehold guarantee deposits, Current | $ 54,552 | $ 54,422
Leasehold guarantee deposits, Non-current | 22,053 | 21,669
Other deposits, Current |  |
Other deposits, Non-current | 1,091 | 1,088
Loan, Current |  |
Loan, Non-current | 326,820 | 306,494
Total, Current | 54,552 | 54,422
Total, Non-current | $ 349,964 | $ 329,252

X
- Definition The amount of leasehold guarantee deposits, current. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of leasehold guarantee deposits, non-current. + References No definition available. + Details
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Namespace Prefix: | osrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of loan, current. + References No definition available. + Details
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Namespace Prefix: | osrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of loan, non-current. + References No definition available. + Details
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Namespace Prefix: | osrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of other deposits, current. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition The amount of other deposits, non-current. + References No definition available. + Details
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Namespace Prefix: | osrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The amount of other financial assets current. + References No definition available. + Details
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Balance Type: | debit
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- Definition The amount of other financial assets non-current. + References No definition available. + Details
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Namespace Prefix: | osrh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
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