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Marketable Securities (Tables)
 9 Months Ended
Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
Summary of Available-for-Sale Marketable Securities
The following is a summary of the Company’s available-for-sale marketable securities as of September 30, 2020, which all have contractual maturities of less than two years:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Market
Value
(in thousands)
U.S. Treasury and government agencies$151,307 $197 $(3)$151,501 
Corporate debt139,831 249 (6)140,074 
Total marketable securities$291,138 $446 $(9)$291,575 
The following is a summary of the Company’s available-for-sale marketable securities as of December 31, 2019, which all have contractual maturities of less than two years:
Amortized
Cost		Gross
Unrealized
Gains		Gross
Unrealized
Losses		Fair
Market
Value
(in thousands)
U.S. Treasury and government agencies$88,535 $68 $(2)$88,601 
Corporate debt129,860 196 (1)130,055 
Asset-backed securities48,355 49 (3)48,401 
Total marketable securities$266,750 $313 $(6)$267,057