The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Patent renewal fees		$ 25,000vicr_PatentRenewalFees	$ 38,000vicr_PatentRenewalFees
Amortization expense		170,000us-gaap_AmortizationOfIntangibleAssets	264,000us-gaap_AmortizationOfIntangibleAssets	314,000us-gaap_AmortizationOfIntangibleAssets
Impairment of goodwill	2,012,000us-gaap_GoodwillImpairmentLoss			2,012,000us-gaap_GoodwillImpairmentLoss
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Future amortization expense from patent assets held for 2015		143,000
Future amortization expense from patent assets held for 2016		130,000
Future amortization expense from patent assets held for 2017		124,000
Future amortization expense from patent assets held for 2018		108,000
Future amortization expense from patent assets held for 2019		$ 102,000