Quarterly report pursuant to Section 13 or 15(d)

CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS (Details)

v3.21.1
CASH EQUIVALENTS AND SHORT-TERM INVESTMENTS (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]    
Cash equivalents $ 413,089 $ 482,886
Amortized Cost 155,855 111,876
Unrealized Gains 13 2
Unrealized losses (21) (11)
Fair Value 155,847 111,867
Total cash equivalents and short-term investments, Amortized Cost 568,944 594,762
Total cash equivalents and short-term investments, Fair Value 568,936 594,753
U.S Treasury securities    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 5,000 19,995
Unrealized Gains   2
Fair Value 5,000 19,997
Commercial paper    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 89,835 43,911
Fair Value 89,835 43,911
Corporate bonds    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost 61,020 47,970
Unrealized Gains 13  
Unrealized losses (21) (11)
Fair Value 61,012 47,959
Commercial paper    
Debt Securities, Available-for-sale [Line Items]    
Cash equivalents   75,374
Money market funds    
Debt Securities, Available-for-sale [Line Items]    
Cash equivalents $ 413,089 $ 407,512