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Marketable Securities (Tables)
9 Months Ended
Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
Available-for-sale Marketable Securities
The following tables summarize the Company's marketable debt and equity securities (in thousands):
September 30, 2020
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
U.S. Treasury securities$60,003 $$— $60,005 
Government-sponsored enterprises14,006 — 14,007 
Corporate debt securities5,010 — — 5,010 
Total$79,019 $$— $79,022 
December 31, 2019
Amortized
Cost
Gross
Unrealized
Gains
Gross
Unrealized
Losses
Fair
Value
Government-sponsored enterprises$13,216 $$— $13,222 
Corporate debt securities76,052 20 (10)76,062 
Total$89,268 $26 $(10)$89,284