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Significant Accounting Policies - Summary of Sales Return Reserve (Details) - USD ($) $ in Thousands	12 Months Ended
	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