Income (loss) per share (Tables)

12 Months Ended

Dec. 31, 2013

Schedule of the computation of basic and diluted net income (loss) per share

The following table presents the calculation of basic and diluted net income (loss) per share:



	Years ended December 31,
(in thousands, except for share and per share amounts)	2013			2012			2011
Numerator:
Net (loss) income	$	(10,465	)	$	2,893		$	(2,479	)
Less: undistributed earnings attributable to participating securities	—			(1,366		)	—
Net (loss) income attributable to common stockholders	$	(10,465	)	$	1,527		$	(2,479	)
Reallocation of undistributed earnings attributable to participating securities	—			32			—
Net (loss) income attributable to common stockholders for diluted net (loss) income per share	$	(10,465	)	$	1,559		$	(2,479	)

Denominator:
Weighted-average shares used to compute basic net income (loss) per common share	24,621			17,979			3,370
Effect of potentially dilutive securities:
Employee stock options and restricted stock units	—			2,547			—
Stock warrants	—			82			—
Weighted average shares used to compute diluted income (loss) per common share	24,621			20,608			3,370
Net (loss) income per share
Net (loss) income per common share - basic and diluted	$(0.43)			$0.08			$(0.74)

Schedule of antidilutive securities excluded from computation of earnings per share

For the years ended 2013, 2012 and 2011, the following securities were not included in the calculation of diluted shares outstanding as the effect would have been anti-dilutive:



	As of December 31,
(in thousands)	2013	2012	2011
Convertible preferred stock (on an as if converted basis)	—	—	12,916
Options to purchase common stock	3,335	367	3,808
Common stock subject to repurchase	25	—	169
Warrants to purchase convertible preferred stock	—	—	213
Warrants to purchase common stock	44	—	—
Restricted stock units	623	25	—
Restricted stock awards	12	—	—