Net Income (Loss) per Share

3 Months Ended

Mar. 31, 2021

Earnings Per Share [Abstract]

Net Income (Loss) per Share

9. Net Income (Loss) per Share

The following table sets forth the computation of basic and diluted net income (loss) per share (in thousands, except per share amounts):

	Three Months Ended March 31,
	2021		2020
Numerator:
Net income (loss) attributable to Vicor Corporation	$	15,092	$	(1,735	)
Denominator:
Denominator for basic net income per share-weighted average shares (1)		43,455		40,635
Effect of dilutive securities:
Employee stock options (2)		1,386		—
Denominator for diluted net income per share – adjusted weighted-average shares and assumed conversions		44,841		40,635
Basic net income (loss) per share	$	0.35	$	(0.04	)
Diluted net income (loss) per share	$	0.34	$	(0.04	)

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

(2) Options to purchase 40,339 and 2,615,335 shares of Common Stock for the three months ended March 31, 2021 and 2020, respectively, were not included in the calculations of net income per share as the effect would have been antidilutive.