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Significant Accounting Policies - Summary of Sales Return Reserve (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Accounting Policies [Abstract] |  |  |
Beginning balance | $ 29,184 | $ 19,005 | $ 13,198
Returns | (691,953) | (530,824) | (385,022)
Provisions | 697,873 | 541,003 | 390,829
Ending balance | $ 35,104 | $ 29,184 | $ 19,005

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- Definition Contract with customer liability sales return reserves provision. + References No definition available. + Details
Name: | rvlv_ContractWithCustomerLiabilitySalesReturnReservesProvision
Namespace Prefix: | rvlv_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Contract with customer liability sales return reserves sales return. + References No definition available. + Details
Name: | rvlv_ContractWithCustomerLiabilitySalesReturnReservesSalesReturn
Namespace Prefix: | rvlv_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Current regulatory liabilities generally represent obligations to make refunds to customers for various reasons including overpayment. + References No definition available. + Details
Name: | us-gaap_CustomerRefundLiabilityCurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant