Loss Per Share

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Loss Per Share

12. 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	)

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