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Marketable Securities (Tables)
12 Months Ended
Dec. 31, 2021
Marketable Securities [Abstract]  
Summary of Marketable Securities Marketable securities consisted of the following as of the periods presented (in thousands):
December 31, 2021
Amortized Cost
Gross Unrealized GainsGross Unrealized Losses Fair Value
Marketable Securities
U.S. Treasury securities$157,681 $— $(404)$157,277 
Certificates of deposit6,495 — (5)6,490 
Corporate debt securities36,422 — (95)36,327 
Commercial paper
11,624 (6)11,620 
Asset-backed securities5,901 (7)5,895 
Total marketable securities$218,123 $$(517)$217,609 
    
December 31, 2020
Amortized Cost
Gross Unrealized Gains
Gross Unrealized LossesFair Value
Marketable Securities
Certificates of deposit$3,000 $— $— $3,000 
Total marketable securities$3,000 $— $— $3,000 
Summary of Marketable Securities in an Unrealized Loss Position
Marketable securities in an unrealized loss position for less than 12 months consisted of the following as of December 31, 2021 ((in thousands):
Fair ValueGross Unrealized Loss
U.S. Treasury securities$143,590 $(404)
Certificates of deposit6,490 (5)
Corporate debt securities36,327 (95)
Commercial paper6,984 (6)
Asset-backed securities4,967 (7)
Total$198,358 $(517)
Summary of Remaining Contractual Maturities of Marketable Securities
The following summarizes the remaining contractual maturities of the Company’s marketable securities as of December 31, 2021:
Fair Value
One year or less$119,795 
Over one year through five years97,814 
Total marketable securities$217,609