Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Schedule of Basic and Diluted Net Loss Per Share

Basic and diluted loss per share was calculated as follows:

	Year Ended December 31,
	2019			2018			2017
	(In thousands)
Net loss	$	(99,533	)	$	(85,343	)	$	(67,543	)
Weighted average shares outstanding, basic    and diluted		47,247			43,069			36,006
Net loss per share, basic and diluted	$	(2.11	)	$	(1.98	)	$	(1.88	)

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 in 2019, 2018 and 2017 because their inclusion would have been anti-dilutive:

	Year Ended December 31,
	2019		2018		2017
	(In thousands)
Unvested restricted stock		72		109		480
Stock options		5,366		5,038		4,705
		5,438		5,147		5,185