Net Loss Per Common Share (Tables)

12 Months Ended

Dec. 31, 2015

Net Loss Per Common Share

Schedule of computation of basic and diluted net loss per common share

	Years ended December 31,
	2015			2014			2013
Basic and diluted net loss per common share calculation:
Net loss	$	(105,717	)	$	(116,772	)	$	(51,145	)
Accretion of preferred stock dividends		—			—			(5,891	)
Net loss attributable to common stockholders	$	(105,717	)	$	(116,772	)	$	(57,036	)
Weighted average common shares outstanding		34,580			33,258			9,003
Net loss per common share—basic and diluted	$	(3.06	)	$	(3.51	)	$	(6.34	)

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

	Years ended December 31,
	2015		2014		2013
Options outstanding		3,009		3,680		2,708
Restricted stock units		288		37		—
Warrants		—		14		88
Total		3,297		3,731		2,796