Net Loss Per Share

12 Months Ended

Dec. 31, 2013

Earnings Per Share [Abstract]

Net Loss Per Share

14. Net Loss Per Share

Net loss attributable to common stockholders per share is computed by dividing the net loss allocable to common stockholders by the weighted-average number of shares of common stock outstanding. Outstanding stock options, warrants and preferred stock, have not been included in the calculation of diluted net loss attributable to common stockholders per share because to do so would be anti-dilutive. Accordingly, the numerator and the denominator used in computing both basic and diluted net loss per share for each period are the same.

The following table as of December 31 provides a reconciliation of the numerator and denominator used in computing basic and diluted net loss per share:

	2013			2012			2011
	(In thousands)
Numerator:
Net loss	$	(29,281	)	$	(17,708	)	$	(10,932	)
Accretion of mandatorily redeemable convertible preferred stock		(4,653	)		(7,533	)		(5,251	)
Net loss attributable to common stockholders	$	(33,934	)	$	(25,241	)	$	(16,183	)
Denominator:
Weighted-average common shares outstanding-basic and diluted		7,643			355			323

The following outstanding options, warrants and preferred stock as of December 31 were excluded from the computation of diluted net loss per share for the periods presented because their effect would have been anti-dilutive:

	2013		2012		2011
	(In thousands)
Options to purchase common stock		2,113		1,686		686
Convertible preferred stock (as converted)		—		8,631		7,567
Convertible preferred stock warrants (as converted)		—		607		509
Common stock warrant		618		—		1