Thyroid Cytopathology Partners (Details) - Thyroid Cytopathology Partners - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Thyroid Cytopathology Partners
Notice of intent not to renew period	12 months
Reduction to rent expense for TCP's portion of costs for subleased space		$ 11

Represents the minimum period required to provide notice of intent not to renew agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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