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The increase (decrease) during the reporting period, excluding the portion taken into income, in the liability reflecting revenue yet to be earned for which cash or other forms of consideration was received or recorded as a receivable.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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The amount of previously reported deferred or unearned revenue that was recognized as revenue during the period. For cash flows, this element primarily pertains to amortization of deferred credits on long-term arrangements. As a noncash item, it is deducted from net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 13.A.3)
-URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 13.A.4)
-URI http://asc.fasb.org/extlink&oid=65893310&loc=d3e214044-122780

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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Represents the minimum period required for providing notice of termination to the agreement.

No definition available.

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Represents the amount of co-promotion expenses incurred under the agreement.

No definition available.

Name:	vcyt_CollaborativeArrangementCoPromotionExpenses
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Represents the amortization period of co-promotion fee.

No definition available.

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Represents the co-promotion fees paid to co-promoter as a percentage of cash receipts under the agreement.

No definition available.

Name:	vcyt_CollaborativeArrangementCoPromotionFeesPercentageOfCashReceipts
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Period Type:	duration

Represents the co-promotion fees paid to co-promoter as a percentage of net revenue under the agreement.

No definition available.

Name:	vcyt_CollaborativeArrangementCoPromotionFeesPercentageOfNetRevenue
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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the number of countries outside United States in which marketing authorization is obtained under the agreement.

No definition available.

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

Represents the amount of outstanding obligation under the agreement.

No definition available.

Name:	vcyt_CollaborativeArrangementOutstandingObligation
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the term of the co-promotion agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	vcyt_CollaborativeArrangementTerm
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Name:	us-gaap_CounterpartyNameAxis=vcyt_GenzymeCorporationMember
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Data Type:	na
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Period Type:

Name:	us-gaap_TypeOfArrangementAxis=vcyt_CollaborativeArrangementCopromotionAfirmaThyroidDiagnosticSolutionMember
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