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Quarterly Results of Operations (Unaudited) - Summary of Unaudited Quarterly Financial Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 60,735us-gaap_SalesRevenueNet	$ 58,402us-gaap_SalesRevenueNet	$ 53,361us-gaap_SalesRevenueNet	$ 53,233us-gaap_SalesRevenueNet	$ 55,258us-gaap_SalesRevenueNet	$ 55,091us-gaap_SalesRevenueNet	$ 46,865us-gaap_SalesRevenueNet	$ 41,946us-gaap_SalesRevenueNet	$ 225,731us-gaap_SalesRevenueNet	$ 199,160us-gaap_SalesRevenueNet	$ 218,507us-gaap_SalesRevenueNet
Gross margin	26,116us-gaap_GrossProfit	25,550us-gaap_GrossProfit	22,662us-gaap_GrossProfit	22,792us-gaap_GrossProfit	23,431us-gaap_GrossProfit	22,980us-gaap_GrossProfit	18,461us-gaap_GrossProfit	16,607us-gaap_GrossProfit	97,120us-gaap_GrossProfit	81,479us-gaap_GrossProfit	91,651us-gaap_GrossProfit
Consolidated net loss	(43)us-gaap_ProfitLoss	(3,669)us-gaap_ProfitLoss	(4,932)us-gaap_ProfitLoss	(5,426)us-gaap_ProfitLoss	(13,020)us-gaap_ProfitLoss	(898)us-gaap_ProfitLoss	(4,600)us-gaap_ProfitLoss	(4,986)us-gaap_ProfitLoss	(14,070)us-gaap_ProfitLoss	(23,504)us-gaap_ProfitLoss	(3,798)us-gaap_ProfitLoss
Net income (loss) attributable to noncontrolling interest	(43)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	5us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	(97)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	(48)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	82us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	34us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	16us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	4us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	(183)us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	136us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	279us-gaap_NetIncomeLossAttributableToNoncontrollingInterest
Net loss attributable to Vicor Corporation		$ (3,674)us-gaap_NetIncomeLoss	$ (4,835)us-gaap_NetIncomeLoss	$ (5,378)us-gaap_NetIncomeLoss	$ (13,102)us-gaap_NetIncomeLoss	$ (932)us-gaap_NetIncomeLoss	$ (4,616)us-gaap_NetIncomeLoss	$ (4,990)us-gaap_NetIncomeLoss	$ (13,887)us-gaap_NetIncomeLoss	$ (23,640)us-gaap_NetIncomeLoss	$ (4,077)us-gaap_NetIncomeLoss
Net loss per share attributable to Vicor Corporation:
Basic and diluted		$ (0.10)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.13)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.14)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.34)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.02)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.12)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.12)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.36)us-gaap_EarningsPerShareBasicAndDiluted	$ (0.60)us-gaap_EarningsPerShareBasicAndDiluted

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