Net Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2015

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

The following table provides a reconciliation of the numerator and denominator used in computing basic and diluted net loss per share for the years ended December 31 (in thousands):


	2015			2014			2013
Numerator:
Net loss	$	(45,581	)	$	(50,038	)	$	(29,281	)
Accretion of mandatorily redeemable convertible preferred stock		—			—			(4,653	)

Net loss attributable to common stockholders	$	(45,581	)	$	(50,038	)	$	(33,934	)

Denominator:
Weighted-average common shares outstanding-basic and diluted		19,027			17,839			7,643

Summary of Outstanding Options, Warrants and preferred stock were 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 (in thousands):


	2015		2014		2013
Options to purchase common stock		4,069		3,295		2,113
Common stock warrants		572		572		618