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Product Warranties - Product Warranty Activity (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Guarantees [Abstract]
Balance at the beginning of the period	$ 187	$ 249	$ 204	$ 283
Accruals for warranties for products sold in the period	170	60	185	84
Fulfillment of warranty obligations	(25)	(77)	(57)	(132)
Revisions of estimated obligations		(7)		(10)
Balance at the end of the period	$ 332	$ 225	$ 332	$ 225

X

- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
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- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 460



-SubTopic 10



-Section 50



-Paragraph 8



-Subparagraph (c)(1),(c)(5)



-URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249

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Name:	us-gaap_StandardProductWarrantyAccrual
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the aggregate decrease in the liability for payments made (in cash or in kind) to satisfy claims under the terms of the standard product warranty. Does not include any Increase or Decrease in the liability for payments related to extended product warranties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 460



-SubTopic 10



-Section 50



-Paragraph 8



-Subparagraph ((c)(2))



-URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
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- Definition

Represents the aggregate increase in the liability for accruals related to standard product warranties issued during the reporting period. Does not include any increase in the liability for accruals related to extended product warranties.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 460



-SubTopic 10



-Section 50



-Paragraph 8



-Subparagraph ((c)(3))



-URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249

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- Definition

Revisions of estimated obligations.

+ References

No definition available.

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Namespace Prefix:	vicr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration