Net Loss Per Common Share (Tables)

12 Months Ended

Dec. 31, 2017

Net Loss Per Common Share

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

	Year Ended	Year Ended	Year Ended
	December 31,	December 31,	December 31,
	2017	2016	2015
Stock options	3,167	2,577	1,749
Stock warrants	306	306	326
Unvested service-based restricted stock units	27	58	—
Unvested performance-based restricted stock units	49	—	1,751
	3,549	2,941	3,826

Summary of the basic and diluted net loss per common share

	Year Ended		Year Ended		Year Ended
	December 31,		December 31,		December 31,
	2017		2016		2015
Numerator:
Net loss and comprehensive loss	$	(218,051)	$	(83,012)	$	(38,474)
Denominator:
Weighted-average basic and diluted common shares		29,935		22,648		7,088
Basic and diluted net loss per common share	$	(7.28)	$	(3.67)	$	(5.43)