Net (Loss) Income per Share

9 Months Ended

Sep. 30, 2019

Net (Loss) Income per Share

Net (Loss) Income per Share

4.     Net (Loss) Income per Share

Basic net (loss) income per share is computed by dividing net (loss) income attributable to common stockholders by the weighted average number of shares of common stock of the Company outstanding during the period. Diluted net (loss ) income per share is computed by dividing net (loss) income attributable to common stockholders by the weighted average number of shares of common stock outstanding during the period plus the impact of dilutive securities, to the extent that they are not anti-dilutive.

The following table presents the calculation of basic and diluted net (loss) income per share for the Company’s common stock:

	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2019		2018		2019		2018
Numerator (basic and diluted):
Net (loss) income	$	(8,104)	$	10,416	$	(25,612)	$	(36,704)
Denominator (basic):
Weighted average shares of common stock outstanding, basic		20,691,112		19,217,623		20,520,357		18,989,334
Denominator (diluted):
Weighted average shares of common stock outstanding		20,691,112		19,217,623		20,520,357		18,989,334
Effect of potential dilutive securities:
Weighted average dilutive effect of stock options		—		1,898,543		—		—
Weighted average dilutive effect of restricted shares		—		898,821		—		—
Weighted average dilutive effect of contingently issuable shares		—		273,886		—		—
Weighted average shares of common stock outstanding, diluted		20,691,112		22,288,873		20,520,357		18,989,334
Net (loss) income per share, basic	$	(0.39)	$	0.54	$	(1.25)	$	(1.93)
Net (loss) income per share, diluted	$	(0.39)	$	0.47	$	(1.25)	$	(1.93)

The following potential common shares, presented based on amounts outstanding as of September 30, 2019 and 2018, were excluded from the calculation of diluted net loss per share for the three months ended September 30, 2019 and the nine months ended September 30, 2019 and 2018 because including them would have had an anti-dilutive effect.

	September 30,
	2019	2018
Stock options to purchase common stock	2,840,849	2,566,855
Unvested restricted stock	1,330,088	1,063,681
Common stock warrants	4,646,393	—
Contingently issuable shares	20,000	142,679
	8,837,330	3,773,215

Shares of common stock associated with the potential conversion of the Company’s convertible senior subordinated notes have been excluded in the table above.