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Common Stock and Employee Stock Plans (Tables)
 12 Months Ended
Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]  
Schedule of Common Stock Reserved for Future Issuance
The following table summarizes the Company’s shares of common stock reserved for issuance as of December 31, 2022:
Options issued and outstanding under the 2008 Plan993,145 
RSUs outstanding under the 2008 Plan, the 2018 Plan, and the 2019 Plan 22,315,333 
Remaining shares available for future issuance under the 2019 ESPP Plan and the 2019 Plan72,818,573 
Schedule of Stock Options Activity
The summary of stock option activity is as follows (in thousands, except per share data):
Options Outstanding
Number of
Shares		Weighted-
Average
Exercise
Price		Weighted-
Average
Remaining
Contractual
Life		Aggregate
Intrinsic
Value
(in years)
Balance as of December 31, 20211,105 $4.79 1.83$41,916 
Exercises(112)4.09 
Forfeitures— — 
Cancellations— — 
Balance as of December 31, 2022993 $4.87 1.89$6,109 
Schedule of Restricted Stock Unit Activity
The summary of restricted stock unit activity (“RSU”) is as follows (in thousands, except per share data):
Number of
Shares		Weighted-
Average
Grant Date
Fair Value		Aggregate
Intrinsic
Value
Nonvested units as of December 31, 202117,116 $45.75 $730,528 
Granted35,189 24.57 
Vested(23,928)33.78 
Canceled(6,062)34 
Nonvested units as of December 31, 202222,315 $28.15 $244,926 
Expected to vest as of December 31, 2022
21,165 $233,242 
Schedule of Stock-Based Compensation Expense
The Company recorded stock-based compensation expense on the consolidated statements of operations for the periods indicated as follows (in thousands):
Year Ended December 31,
202220212020
Cost of revenue$44,132 $39,491 $28,743 
Operations and support25,442 24,083 15,829 
Research and development391,983 414,324 325,624 
Sales and marketing49,867 38,243 23,385 
General and administrative239,343 208,419 172,226 
Total stock-based compensation expense$750,767 $724,560 $565,807