- Definition

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.

+ References

No definition available.

+ Details

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

- Definition

Value of new stock classified as temporary equity issued during the period.

+ References

No definition available.

+ Details

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

- Definition

In the aggregate, the maximum milestone payments to be received from the collaborative partner.

+ References

No definition available.

+ Details

Name:	vygr_CollaborativeArrangementAggregateMaximumMilestonePaymentsToBeReceivedFromCollaborativePartner
Namespace Prefix:	vygr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Maximum potential in-kind services to be provided by a collaborative partner.

+ References

No definition available.

+ Details

Name:	vygr_CollaborativeArrangementInkindServicesToBeProvidedByCollaborativePartnerMaximumPotential
Namespace Prefix:	vygr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The non-redeemable upfront fee received by the reporting entity from the collaborative partner.

+ References

No definition available.

+ Details

Name:	vygr_CollaborativeArrangementNonredeemableUpFrontFeeReceived
Namespace Prefix:	vygr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of anniversary date of the Future Program nomination by the counterparty that triggers a reduction in the milestone or royalty payments to be made by the collaborative partner.

+ References

No definition available.

+ Details

Name:	vygr_CollaborativeArrangementNumberOfAnniversaryDateOfFutureProgramNominationByCounterPartyThatTriggersReductionInMilestoneOrRoyaltyPaymentsMadeByCollaborativePartner
Namespace Prefix:	vygr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Option exercise payment required from collaborative partner for each program specified.

+ References

No definition available.

+ Details

Name:	vygr_CollaborativeArrangementOptionExercisePaymentRequiredFromCollaborativePartnerForEachProgramSpecified
Namespace Prefix:	vygr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Per milestone, the maximum milestone payments to be received from the collaborative partner.

+ References

No definition available.

+ Details

Name:	vygr_CollaborativeArrangementPerMilestoneMaximumMilestonePaymentsToBeReceivedFromCollaborativePartner
Namespace Prefix:	vygr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the amount of collaborative arrangement related milestone payments that are no longer receivable.

+ References

No definition available.

+ Details

Name:	vygr_CollaborativeArrangementRelatedMilestonePaymentsThatAreNoLongerReceivable
Namespace Prefix:	vygr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The aggregate fair value of temporary equity.

+ References

No definition available.

+ Details

Name:	vygr_TemporaryEquityFairValue
Namespace Prefix:	vygr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The premium over the aggregate fair value of the temporary equity.

+ References

No definition available.

+ Details

Name:	vygr_TemporaryEquityPremium
Namespace Prefix:	vygr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of shares of new stock classified as temporary equity issued during the period upon exchange of convertible debt.

+ References

No definition available.

+ Details

Name:	vygr_TemporaryEquityStockIssuedDuringPeriodSharesNewIssuesUponExchangeOfConvertibleDebt
Namespace Prefix:	vygr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_CounterpartyNameAxis=vygr_GenzymeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	vygr_MilestoneAchievementAxis=vygr_RegulatoryApprovalMilestoneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	vygr_MilestoneAchievementAxis=vygr_CommercialMilestoneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	srt_ProductOrServiceAxis=vygr_ParkinsonProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	vygr_MilestoneAchievementAxis=vygr_RegulatoryAndCommercialMilestoneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=vygr_SpinalMuscularAtrophyProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_ProductOrServiceAxis=vygr_SplitTerritoryProgramMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=vygr_RedeemableConvertiblePreferredStockSeriesBMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and contingencies - Significant Agreements - (Details) - Sanofi Genzyme - USD ($) $ in Millions	1 Months Ended
	Oct. 31, 2017	Feb. 28, 2015
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Amount of reduction in milestone or royalty payments to be made by collaborative partner for each program specified		$ 10.0
Per Milestone, maximum milestone payments to be received from collaborative partner	$ 540.0
Regulatory approval milestone
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Aggregate maximum milestone payments to be received from collaborative partner	220.0
Regulatory approval milestone \| Minimum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Per Milestone, maximum milestone payments to be received from collaborative partner	40.0
Regulatory approval milestone \| Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Per Milestone, maximum milestone payments to be received from collaborative partner	50.0
Commercial Milestone
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Aggregate maximum milestone payments to be received from collaborative partner	320.0
Commercial Milestone \| Minimum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Per Milestone, maximum milestone payments to be received from collaborative partner	50.0
Commercial Milestone \| Maximum
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Per Milestone, maximum milestone payments to be received from collaborative partner	100.0
Collaborative Arrangement
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Non-refundable upfront payment received		65.0
Premium over fair value on temporary equity issued		5.0
Parkinson's Program \| Regulatory and commercial milestone
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Milestone payments no longer receivable	$ 105.0
Spinal Muscular Atrophy Program
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Maximum potential in-kind services to be provided by collaborative partner		5.0
Option exercise payment required from collaborative partner for each program specified		30.0
Split Territory Program
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Option exercise payment required from collaborative partner for each program specified		$ 20.0
Redeemable Convertible Preferred Stock Series B \| Collaborative Arrangement
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Temporary equity issued (in shares)		10,000,000
Temporary equity issued		$ 30.0
Fair value of temporary equity issued		25.0
Premium over fair value on temporary equity issued		$ 5.0