Net Loss Per Common Share (Tables).

12 Months Ended

Dec. 31, 2014

Net Loss Per Common Share

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

	Year ended December 31,
	2014 (Restated)			2013			2012
Basic and diluted net loss per common share calculation:
Net loss	$	(116,772	)	$	(51,145	)	$	(14,562	)
Accretion of preferred stock dividends	—			(5,891		)	(7,063		)
Net loss attributable to common stockholders	$	(116,772	)	$	(57,036	)	$	(21,625	)
Weighted average common shares outstanding	33,258			9,003			1,452
Net loss per share of common stock - basic and diluted	$	(3.51	)	$	(6.34	)	$	(14.89	)

Schedule of potentially dilutive securities that have been excluded from the computations of diluted weighted average shares outstanding

	Years ended December 31,
	2014	2013	2012
Redeemable convertible preferred stock	—	—	16,663
Options outstanding	3,680	2,708	1,344
Warrants	14	88	94
Restricted stock units	37	—	—
Total	3,731	2,796	18,101