Name:	us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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

Name:	us-gaap_IncreaseDecreaseInDeferredRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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

Name:	us-gaap_RecognitionOfDeferredRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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

No definition available.

Name:	vcyt_CollaborativeArrangementCoPromotionExpenses
Namespace Prefix:	vcyt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
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
Namespace Prefix:	vcyt_
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.

Name:	vcyt_CollaborativeArrangementNumberOfCountriesOutsideUnitedStatesInWhichMarketingAuthorizationIsObtained
Namespace Prefix:	vcyt_
Data Type:	xbrli:integerItemType
Balance Type:	na
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
Namespace Prefix:	vcyt_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Name:	us-gaap_TypeOfArrangementAxis=us-gaap_CollaborativeArrangementCopromotionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_CounterpartyNameAxis=vcyt_GenzymeCorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_BalanceSheetLocationAxis=us-gaap_AccruedLiabilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_TypeOfArrangementAxis=vcyt_CollaborativeArrangementCopromotionAfirmaThyroidDiagnosticSolutionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_TypeOfArrangementAxis=vcyt_CollaborativeArrangementCopromotionAfirmaGecMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: