Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2015

Summary of Significant Accounting Policies

Reconciliation of the weighted average number of shares used to compute basic and diluted net loss per share

	2015			2014
	(In thousands, except per share amounts)
Numerator:
Net loss:	$	(27,369	)	$	(14,298	)
Denominator:
Weighted average common shares used in calculation of basic net loss per share:	49,957			39,240
Effect of dilutive securities:
Common stock options	—			—
Restricted stock and restricted stock units	—			—
Common stock warrant	—			—
Weighted average common shares outstanding used in calculation of diluted net loss per share	49,957			39,240
Net loss per share:
Basic and Diluted	$	(0.55	)	$	(0.36	)

Potentially dilutive securities excluded from computations of diluted weighted-average shares outstanding

The following potentially dilutive securities have been excluded from the computations of diluted weighted-average common shares outstanding as of March 31, 2015 and 2014 as their effect would have been anti-dilutive (in thousands):

	2015	2014
Stock options to purchase common stock	4,821	4,230
Restricted stock units	53	18