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Commitments and Contingencies - Additional Information (Detail)	Mar. 31, 2021 USD ($) ft²
Commitments and Contingencies Disclosure [Abstract]
Capital expenditure commitments	$ 11,457,000
Budgeted capital expenditures	$ 38,000,000
Area of Land | ft²	90,000

X

- Definition

Area of land held.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfLand
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Definition

Budgeted capital expenditures.

+ References

No definition available.

+ Details

Name:	vicr_BudgetedCapitalExpenditures
Namespace Prefix:	vicr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Commitment on capital expenditure.

+ References

No definition available.

+ Details

Name:	vicr_CommitmentOnCapitalExpenditure
Namespace Prefix:	vicr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant