v3.20.2
Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2020
Share-based Payment Arrangement [Abstract]  
Summary of Stock Option Activity
The following table summarizes stock option activity for the nine months ended September 30, 2020 (in thousands, except share and per share amounts):
 
 
  
Options
Outstanding
  
Weighted-
Average

Exercise Price
Per Share
 
  
Weighted-
Average

Remaining
Contractual
Life (years)
 
  
Aggregate
Intrinsic Value
 
Balance as of December 31, 2019
  
 
497,441,159
 
  
$
4.10
 
  
 
5.81
 
  
$
975,798
 
Options granted
(1)
  
 
397,885,337
 
  
 
7.43
 
  
   
  
   
Options exercised
  
 
(69,444,099
) 
  
 
1.67
 
  
   
  
   
Options canceled and forfeited
(1)
  
 
(238,005,542
) 
  
 
5.95
 
  
   
  
   
 
  
 
 
 
  
   
  
   
  
   
Balance as of September 30, 2020
  
 
587,876,855
 
  
$
5.89
 
  
 
7.99
 
  
$
2,120,561
 
 
  
 
 
 
  
   
  
   
  
   
Options vested and exercisable as of September 30, 2020
  
 
344,033,233
 
  
$
3.64
 
  
 
5.90
 
  
$
2,014,537
 
 
  
 
 
 
  
   
  
   
  
   
 
 
(1)
Includes options that were canceled and
re-granted
as part of the option repricing modification, as further discussed below.
Summary of RSU Activity
The following table summarizes the RSU activity for the nine months ended September 30, 2020:
 
 
  
RSUs
Outstanding
 
Weighted Average

Grant Date Fair

Value per Share
Unvested and outstanding as of December 31, 2019
  
 
179,494,619
 
$
6.03
RSUs granted
  
 
96,707,758
 
 
7.49
RSUs vested
  
 
(68,149,214
)
 
 
6.18
RSUs canceled
  
 
(8,397,930
)
 
 
6.02
 
  
 
 
 
 
   
Unvested and outstanding at September 30, 2020
  
 
199,655,233
 
$
6.69
 
  
 
 
 
 
   
Summary of Stock-Based Compensation Expense
Total stock-based compensation expense was as follows (in thousands):
 
 
  
Three Months Ended

September 30,
  
Nine Months Ended

September 30,
 
  
    2020    
  
    2019    
  
    2020    
  
    2019    
Cost of revenue
  
$
94,385
  
$
7,183
  
$
120,285
  
$
16,520
Sales and marketing
  
 
263,958
  
 
15,898
  
 
322,353
  
 
56,242
Research and development
  
 
256,769
  
 
15,031
  
 
309,698
  
 
49,137
General and administrative
  
 
231,847
  
 
13,651
  
 
276,578
  
 
42,751
 
  
 
 
 
  
 
 
 
  
 
 
 
  
 
 
 
Total stock-based compensation expense
  
$
846,959
  
$
51,763
  
$
1,028,914
  
$
164,650