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Marketable Securities (Tables)
 6 Months Ended
Jun. 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 June 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$149,821  $309  $(10) $150,120  
Corporate debt93,963  461  —  94,424  
Total marketable securities$243,784  $770  $(10) $244,544  
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