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Net Income (Loss) per Share (Tables)

3 Months Ended

Mar. 31, 2013

Net Income (Loss) per Share [Abstract]

Computation of basic and diluted income per share


		Three Months Ended March 31,
		2013				2012

Numerator:
Net income (loss) attributable to Vicor Corporation		$	(4,990	)		$	326

Denominator:
Denominator for basic income (loss) per share-weighted average shares (1)			41,167				41,811
Effect of dilutive securities:
Employee stock options (2)			—				15

Denominator for diluted income (loss) per share - adjusted weighted-average shares and assumed conversions			41,167				41,826


Basic income (loss) per share		$	(0.12	)		$	0.01

Diluted income (loss) per share		$	(0.12	)		$	0.01

(1)	Denominator represents weighted average number of Common Shares and Class B Common Shares outstanding.

(2)

Options to purchase 602,841 shares of Common Stock for the three months ended March 31, 2013 were not included in the calculation of net loss per share as the effect would have been antidilutive. Options to purchase 466,915 shares of Common Stock for the three months ended March 31, 2012 were not included in the computation of diluted income per share because the options’ exercise prices were greater than the average market price of the Common Stock and, therefore, the effect would be antidilutive.