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Investments (Tables)
 6 Months Ended
Jun. 30, 2020
Investments [Abstract]  
Investments
The following table summarizes the contract maturity of the available-for-sale securities the Company held as of June 30, 2020:
One year or less92 %
After one year but within two years8 %
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 June 30, 2020 and December 31, 2019 were as follows:
June 30, 2020
Amortized CostsGross Unrealized Holding GainsGross Unrealized Holding LossesFair Value
Commercial paper$15,166  $22  $—  $15,188  
Corporate notes/bonds44,798  271  (4) 45,065  
U.S. Treasuries2,257  18  —  2,275  
U.S. Government agency securities6,020  31  —  6,051  
$68,241  $342  $(4) $68,579  
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