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Earnings per share
12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Earnings per share 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,
 
 
 
2019
 
2018
 
2017
 
Numerator
 
 

 
 

 
 

 
Net loss
 
$
(251,576
)
 
$
(128,081
)
 
$
(79,000
)
 
Denominator
 
 

 
 

 
 

 
Denominator for basic and diluted net loss per share
 
58,863,185

 
46,576,313

 
39,183,073

 
Net loss per share:
 
 

 
 

 
 

 
Basic and diluted
 
$
(4.27
)
*
$
(2.75
)
*
$
(2.02
)
*
 
* For the years ended December 31, 2019, 2018, and 2017, 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,
 
 
2019
 
2018
 
2017
Stock Options
 
11,054,439

 
8,534,358

 
6,448,642

Unvested restricted stock
 
642,419

 
571,479

 
393,011

Total
 
11,696,858

 
9,105,837

 
6,841,653