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v3.20.2

Note 1 - Organization, Description of Business and Summary of Significant Accounting Policies (Details Textual) |  |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 07, 2020 USD ($) $ / shares shares | May 13, 2020 USD ($) | May 07, 2019 USD ($) $ / shares shares | Dec. 28, 2018 USD ($) | Sep. 30, 2020 USD ($) $ / shares | Sep. 30, 2019 USD ($) $ / shares | Sep. 30, 2020 USD ($) $ / shares | Sep. 30, 2019 USD ($) $ / shares | Dec. 31, 2019 USD ($) | Mar. 30, 2020 USD ($)
Number of Operating Segments |  |  |  |  |  |  | 1 |  |  |
Number of Disease Areas with Genomic Testing |  |  |  |  | 4 |  | 4 |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares | 6,900,000 |  | 6,325,000 |  |  |  |  |  |  |
Sale of Stock, Price Per Share (in dollars per share) | $ / shares | $ 30.00 |  | $ 23.25 |  |  |  |  |  |  |
Proceeds from Issuance of Common Stock | $ 193,800,000 |  | $ 137,800,000 |  |  |  | $ 193,831,000 | $ 137,848,000 |  |
Payments of Stock Issuance Costs | $ 13,200,000 |  | $ 9,200,000 |  |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Cumulative Amount |  |  |  |  | $ 0 |  | 0 |  |  |
Restricted Cash and Cash Equivalents, Noncurrent, Total |  |  |  |  | 603,000 |  | 603,000 |  | $ 603,000 |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  | 31,121,000 | $ 30,973,000 | 82,947,000 | 90,638,000 |  |
Operating Income (Loss), Total |  |  |  |  | $ (4,066,000) | $ (1,763,000) | $ (27,317,000) | $ (6,930,000) |  |
Earnings Per Share, Basic and Diluted, Total (in dollars per share) | $ / shares |  |  |  |  | $ (0.08) | $ (0.02) | $ (0.52) | $ (0.11) |  |
Inventory Write-down |  |  |  |  |  |  | $ 1,088,000 | $ 0 |  |
Loxo Oncology Inc [Member] | Collaborative Arrangement [Member] |  |  |  |  |  |  |  |  |  |
Contract Agreement, Term (Year) |  |  |  |  |  |  | 1 year |  |  |
Contract Agreement, Automatic Renewal Term (Year) |  |  |  |  |  |  | 1 year |  |  |
Contract Agreement, Termination Period (Day) |  |  |  |  |  |  | 90 days |  |  |
Contract with Customer, Liability, Revenue Recognized |  |  |  |  |  |  | $ 0 |  | 0 |
Johnson and Johnson Services Inc JJSI [Member] | Collaborative Arrangement [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  | $ 300,000 | $ 2,000,000.0 | 1,500,000 | 7,000,000.0 |  |
Contract with Customer, Liability, Revenue Recognized |  |  |  |  |  |  | 0 |  | 0 |
Collaborative Agreement, Amount |  |  |  | $ 7,000,000.0 |  |  |  |  |  |
Collaborative Agreement, Contingent Receivable Amount |  |  |  | $ 13,000,000.0 |  |  |  |  |  |
Collaborative Agreement, Period of Payments After First Commercial (Year) |  |  |  | 10 years |  |  |  |  |  |
Collaborative Agreement, Fee Percentage of Cash Collections |  |  |  | 1.00% |  |  |  |  |  |
Accounts Receivable, after Allowance for Credit Loss, Total |  |  |  |  | 800,000 |  | 800,000 |  | 2,000,000.0 |
Acerta Pharma BV [Member] | Collaborative Arrangement [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  | 300,000 |  | 700,000 |  |  |
Accounts Receivable, after Allowance for Credit Loss, Total |  |  |  |  | 500,000 |  | 500,000 |  |  |
Revenue from Achievement of Development Milestones |  |  |  |  | 0 |  | 1,000,000.0 |  |  |
CareDx [Member] | Collaborative Arrangement [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  | 0 |  | 1,000,000.0 |  |  |
Accounts Receivable, after Allowance for Credit Loss, Total |  |  |  |  | 0 |  | 0 |  |  |
Contract with Customer, Liability, Total |  | $ 1,000,000.0 |  |  | 0 |  | 0 |  |  |
Commercial Development Agreement, Maximum Payments Receivable from Counter Party Upon Achievement of Milestones |  | 4,500,000 |  |  |  |  |  |  |  |
Value of Support Services to Counter Party |  | $ 500,000 |  |  |  |  |  |  |  |
Testing [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  | 28,270,000 | 26,723,000 | 70,473,000 | 78,798,000 |  |
Testing [Member] | Cost of Sales [Member] | COVID 19 Pandemic [Member] |  |  |  |  |  |  |  |  |  |
Inventory Write-down |  |  |  |  |  |  | 1,100,000 |  |  |
Testing [Member] | Revenue Recognition [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  | 300,000 | 100,000 | 1,200,000 | 800,000 |  |
Operating Income (Loss), Total |  |  |  |  | $ 300,000 | $ 100,000 | $ 1,200,000 | $ 800,000 |  |
Earnings Per Share, Basic and Diluted, Total (in dollars per share) | $ / shares |  |  |  |  | $ 0 | $ 0 | $ 0.02 | $ 0.02 |  |
Collaborative [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  | $ 0 | $ 2,000,000 | $ 0 | $ 4,000,000 |  |
Product [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  | 2,027,000 | 0 | 7,149,000 | 0 |  |
Product [Member] | Loxo Oncology Inc [Member] | Collaborative Arrangement [Member] |  |  |  |  |  |  |  |  |  |
Contract with Customer, Liability, Revenue Recognized |  |  |  |  |  |  | 0 | 90,000 |  |
Service [Member] | Loxo Oncology Inc [Member] | Collaborative Arrangement [Member] |  |  |  |  |  |  |  |  |  |
Contract with Customer, Liability, Revenue Recognized |  |  |  |  | 300,000 |  | 800,000 |  |  |
Fulfillment of Obligations Relating to Percepta v.2 Development Milestones [Member] | Johnson and Johnson Services Inc JJSI [Member] | Collaborative Arrangement [Member] |  |  |  |  |  |  |  |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax, Total |  |  |  |  |  | $ 2,000,000.0 |  | 4,000,000.0 |  |
Other Noncurrent Assets [Member] |  |  |  |  |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Amount |  |  |  |  | $ 1,000,000.0 |  | $ 1,000,000.0 |  |  |
Overnight Reverse Repurchase Agreements [Member] |  |  |  |  |  |  |  |  |  |
Cash Equivalents, Percentage Collateralized by US Treasury and Agency Securities |  |  |  |  | 102.00% |  | 102.00% |  |  |
Cash Equivalents, at Carrying Value, Total |  |  |  |  | $ 0 |  | $ 0 |  |  |
Collateral for Irrevocable Standby Letter of Credit [Member] |  |  |  |  |  |  |  |  |  |
Restricted Cash and Cash Equivalents, Noncurrent, Total |  |  |  |  |  |  |  |  | $ 603,000 | $ 603,000
Over-Allotment Option [Member] |  |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares | 900,000 |  | 825,000 |  |  |  |  |  |  |
Revision of Prior Period, Adjustment [Member] |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Operating Capital, Total |  |  |  |  |  |  |  | $ 810,000 |  |

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Name: | vcyt_CollaborativeAgreementAmount
Namespace Prefix: | vcyt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of contingent receivable under the collaborative agreement. + References No definition available. + Details
Name: | vcyt_CollaborativeAgreementContingentReceivableAmount
Namespace Prefix: | vcyt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The percentage of cash collections that are to be paid under the collaborative agreement. + References No definition available. + Details
Name: | vcyt_CollaborativeAgreementFeePercentageOfCashCollections
Namespace Prefix: | vcyt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The period of payments commencing after the first commercial under the collaborative agreement. + References No definition available. + Details
Name: | vcyt_CollaborativeAgreementPeriodOfPaymentsAfterFirstCommercial
Namespace Prefix: | vcyt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum payments that receivable from the counter party upon the achievement of commercial milestones. + References No definition available. + Details
Name: | vcyt_CommercialDevelopmentAgreementMaximumPaymentsReceivableFromCounterPartyUponAchievementOfMilestones
Namespace Prefix: | vcyt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The period of the automatic renewal term of the contract agreement. + References No definition available. + Details
Name: | vcyt_ContractAgreementAutomaticRenewalTerm
Namespace Prefix: | vcyt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The period of the contract agreement. + References No definition available. + Details
Name: | vcyt_ContractAgreementTerm
Namespace Prefix: | vcyt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum notice period for termination of the contract agreement. + References No definition available. + Details
Name: | vcyt_ContractAgreementTerminationPeriod
Namespace Prefix: | vcyt_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of disease areas with genomic testing. + References No definition available. + Details
Name: | vcyt_NumberOfDiseaseAreasWithGenomicTesting
Namespace Prefix: | vcyt_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition The amount of revenue recognized for achievement of development milestones. + References No definition available. + Details
Name: | vcyt_RevenueFromAchievementOfDevelopmentMilestones
Namespace Prefix: | vcyt_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The value of support services to the counter party pursuant to the agreement. + References No definition available. + Details
Name: | vcyt_ValueOfSupportServicesToCounterParty
Namespace Prefix: | vcyt_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_CounterpartyNameAxis=vcyt_LoxoOncologyIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_TypeOfArrangementAxis=us-gaap_CollaborativeArrangementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_CounterpartyNameAxis=vcyt_JohnsonAndJohnsonServicesIncJjsiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_CounterpartyNameAxis=vcyt_AcertaPharmaBvMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_CounterpartyNameAxis=vcyt_CareDxMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=vcyt_TestingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_IncomeStatementLocationAxis=us-gaap_CostOfSalesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_UnusualOrInfrequentItemAxis=vcyt_Covid19PandemicMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_ChangeInAccountingEstimateByTypeAxis=vcyt_RevenueRecognitionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=vcyt_CollaborativeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ProductMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ServiceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_ProductOrServiceAxis=vcyt_FulfillmentOfObligationsRelatingToPerceptaV2DevelopmentMilestonesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_BalanceSheetLocationAxis=us-gaap_OtherNoncurrentAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=vcyt_OvernightReverseRepurchaseAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_CashAndCashEquivalentsAxis=vcyt_CollateralForIrrevocableStandbyLetterOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_SubsidiarySaleOfStockAxis=us-gaap_OverAllotmentOptionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RestatementAxis=srt_RestatementAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |