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Investments (Tables)
 9 Months Ended
Sep. 30, 2020
Investments [Abstract]  
Investments
The following table summarizes the contract maturity of the available-for-sale securities the Company held as of September 30, 2020:
One year or less96 %
After one year but within two years4 %
Total100 %
Debt Securities, Available-for-sale
The amortized cost, gross unrealized holding gains, gross unrealized holding losses and fair value of cash equivalents and available-for-sale securities by type of security at September 30, 2020 and December 31, 2019 were as follows:
September 30, 2020
Amortized CostsGross Unrealized Holding GainsGross Unrealized Holding LossesFair Value
Commercial paper$14,932 $11 $— $14,943 
Corporate notes/bonds43,965 163 (2)44,126 
U.S. Treasuries2,254 11 — 2,265 
U.S. Government agency securities1,270 17 — 1,287 
$62,421 202 (2)62,621 
December 31, 2019
Amortized CostsGross Unrealized Holding GainsGross Unrealized Holding LossesFair Value
Commercial paper$13,932 $1 $(2)$13,931 
Corporate notes/bonds36,620 1 (24)36,597 
U.S. Treasuries4,513 — (1)4,512 
U.S. Government agency securities9,786 — (2)9,784 
$64,851 $2 $(29)$64,824