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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.

No definition available.

Name:	us-gaap_BusinessAcquisitionLineItems
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This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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Percentage of equity in the acquiree held by the acquirer immediately before the acquisition date in a business combination.

No definition available.

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Data Type:	num:percentItemType
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Period Type:	instant

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

No definition available.

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Data Type:	xbrli:monetaryItemType
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Amount before tax of gain (loss) recognized on the sale or disposal of a disposal group. Excludes discontinued operations.

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The designation of funds furnished by a borrower to a lender to assure future payments of the borrower's real estate taxes and insurance obligations with respect to a mortgaged property. Escrow deposits may be made for a variety of other purposes such as earnest money and contingent payments. This element excludes replacement reserves which are an escrow separately provided for within the US GAAP taxonomy.

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Amount of divestiture of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Period Type:	duration

Amount before tax of income (loss) from an individually significant component disposed of or held-for-sale attributable to parent. Excludes discontinued operations.

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Business Combination, Consideration Transferred Including Transaction Costs

No definition available.

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Disposal Group, Including Discontinued Operation, Additional Consideration Received

No definition available.

Name:	yelp_DisposalGroupIncludingDiscontinuedOperationAdditionalConsiderationReceived
Namespace Prefix:	yelp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Disposal Group, Including Discontinued Operation, Disposal Related Costs

No definition available.

Name:	yelp_DisposalGroupIncludingDiscontinuedOperationDisposalRelatedCosts
Namespace Prefix:	yelp_
Data Type:	xbrli:monetaryItemType
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Period Type:	duration

Escrow Deposit, Duration

No definition available.

Name:	yelp_EscrowDepositDuration
Namespace Prefix:	yelp_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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Name:	us-gaap_DisposalGroupClassificationAxis=us-gaap_DisposalGroupDisposedOfBySaleNotDiscontinuedOperationsMember
Namespace Prefix:
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Balance Type:
Period Type:

Name:	srt_RestatementAxis=srt_ScenarioPreviouslyReportedMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Name:	srt_RestatementAxis=srt_RestatementAdjustmentMember
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Balance Type:
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Name:	us-gaap_AdjustmentsForNewAccountingPronouncementsAxis=us-gaap_AccountingStandardsUpdate201409Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_BusinessAcquisitionAxis=yelp_NowaitIncMember
Namespace Prefix:
Data Type:	na
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Period Type: