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Summary of Significant Accounting Policies (Tables)
12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Summary of Reconciliation of Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents, and restricted cash reported within the Consolidated Balance Sheets that sum to the total of the amounts shown in the Consolidated Statements of Cash Flows (in thousands):

 

 

 

December 31,

 

 

 

2021

 

 

2020

 

 

2019

 

Cash and cash equivalents

 

$

307,584

 

 

$

713,526

 

 

$

433,584

 

Restricted cash included in prepaid expenses and
other current assets

 

 

 

 

 

10,847

 

 

 

161

 

Restricted cash included in other assets

 

 

2,001

 

 

 

1,921

 

 

 

2,499

 

Total cash, cash equivalents, and restricted cash
    shown in the statements of cash flows

 

$

309,585

 

 

$

726,294

 

 

$

436,244

 

Summary of Useful Lives of Property, Plant and Equipment

The useful lives of property, plant, and equipment are as follows:

 

Research and development equipment

 

5 years

Furniture and office equipment

 

5 years

Computer equipment

 

3 years

Software

 

3-5 years

Land

 

Not applicable

Leasehold improvements

 

Shorter of lease term or estimated useful life