7.	Loss Per Share

The Company calculates basic (loss) earnings per share by dividing (loss) income allocable to common stockholders by the weighted average number of common shares outstanding. The Company computes diluted (loss) earnings per share after giving consideration to the dilutive effect of stock options and unvested restricted stock that are outstanding during the period, except where such securities would be anti-dilutive.

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	)

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