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Related Party Transactions - Additional Information (Details) - Xiaomi | 12 Months Ended
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Dec. 31, 2021
Business Corporation Agreement |
Related Party Transaction [Line Items] |
Related party transaction expiration | 2021-09
Related party transaction agreement renewed date | 2023-09
Youpin Commission Sales Agreement |
Related Party Transaction [Line Items] |
Related party transaction, expire date | Dec. 31, 2021
Related party transaction agreement termination notice period | 30 days
Related party transaction renewed year | 2022

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- Definition Date of maturity or expiration of arrangements with a related party (for example, but not limited to, leasing and debt arrangements between related parties), in YYYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionDate
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
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
Name: | us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related party transaction agreement renewed period month year. + References No definition available. + Details
Name: | viot_RelatedPartyTransactionAgreementRenewedPeriodMonthYear
Namespace Prefix: | viot_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related party transaction agreement termination notice period. + References No definition available. + Details
Name: | viot_RelatedPartyTransactionAgreementTerminationNoticePeriod
Namespace Prefix: | viot_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Related party transaction expiration month year. + References No definition available. + Details
Name: | viot_RelatedPartyTransactionExpirationMonthYear
Namespace Prefix: | viot_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Related party transaction renewed year. + References No definition available. + Details
Name: | viot_RelatedPartyTransactionRenewedYear
Namespace Prefix: | viot_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=viot_XiaomiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionAxis=viot_BusinessCorporationAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_RelatedPartyTransactionAxis=viot_YoupinCommissionSalesAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |