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Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Condensed Consolidated Statements of Comprehensive Income (Loss) [Abstract]
Consolidated net income	$ 341	$ 4,169
Foreign currency translation loss	(234)	(81)
Unrealized gains (net of tax) on available-for-sale securities	221	120
Consolidated comprehensive income	328	4,208
Less: Comprehensive (loss) income attributable to noncontrolling interest	(11)	140
Comprehensive income attributable to Vicor Corporation	$ 339	$ 4,068

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