Earnings per share

Basic earnings per share is computed by dividing net loss available to common stockholders by the weighted-average number of common shares outstanding. Diluted earnings per share is computed by dividing net loss available to common stockholders by the weighted-average number of common shares plus the effect of dilutive potential common shares outstanding during the period.

The following table sets forth the computation of basic and diluted earnings per share for common stockholders:



	Year ended December 31,
	2018				2017				2016
Numerator
Net loss	$	(128,081	)		$	(79,000	)		$	(142,110	)
Denominator
Denominator for basic and diluted net loss per share	46,576,313				39,183,073				34,044,584
Net loss per share:
Basic and diluted	$	(2.75	)	*	$	(2.02	)	*	$	(4.17	)	*

* For the years ended December 31, 2018, 2017, and 2016, the Company experienced a net loss and therefore did not report any dilutive share impact.

The following table shows historical dilutive common share equivalents outstanding, which are not included in the above historical calculation, as the effect of their inclusion is anti-dilutive during each period.



	As of December 31,
	2018	2017	2016
Stock Options	8,534,358	6,448,642	5,854,316
Unvested restricted stock	571,479	393,011	271,651
Total	9,105,837	6,841,653	6,125,967