v3.19.3.a.u2
Stockholders' Equity (Tables)
12 Months Ended
Dec. 31, 2019
Equity [Abstract]  
Schedule of Stock Option Activity under Stock Plans
The following table summarizes the activities of stock option awards under the Stock Plans for the year ended December 31, 2019:
 
Number of Shares
 
Weighted-Average Exercise Price
 
Weighted-Average Remaining Contractual Term
 
Aggregate Intrinsic Value
 
(in thousands)
 
 
 
(in years)
 
(in millions)
Balance as of December 31, 2018
1,137

 
$
13.74

 
 
 
 
Stock options exercised
(1,137
)
 
$
13.74

 
 
 
 
Balances at December 31, 2019

 
$

 

 
$


Schedule of Restricted Stock Units Award Activity

The following table summarizes the activities for our unvested RSUs for the year ended December 31, 2019:
 
Number of Shares
 
Weighted-Average Grant Date Fair Value
 
(in thousands)
 
 
Unvested at December 31, 2018
67,298

 
$
144.77

Granted
54,379

 
$
173.66

Vested
(33,501
)
 
$
142.04

Forfeited
(9,325
)
 
$
145.86

Unvested at December 31, 2019
78,851

 
$
165.74