Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2018

Schedule of Basic and Diluted Net Loss Per Share

Basic and diluted loss per share attributable to common stockholders was calculated as follows:

	Three Months Ended March 31,
	2018			2017
	(In thousands)
Net loss	$	(21,356	)	$	(12,631	)
Weighted average shares outstanding, basic and diluted		42,043			34,723
Net loss per share attributable to common stockholders, basic and diluted	$	(0.51	)	$	(0.36	)

Potential Dilutive Securities Excluded from Computation of Diluted Net Loss Per Common Share

The following common stock equivalents were excluded from the calculation of diluted loss per share because their inclusion would have been anti-dilutive:

	Periods Ended March 31,
	2018		2017
	(In thousands)
Unvested restricted stock		400		1,175
Stock options		4,771		4,373
Total		5,171		5,548