Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Reconciliation of Numerator and Denominator Used in Computing Basic and Diluted Net Loss per Share

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

Outstanding Options, Warrants and Preferred Stock Excluded from Computation of Diluted Net Loss per Share

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