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Investments (Tables)
 3 Months Ended
Mar. 31, 2020
Investments [Abstract]  
Investments
The following table summarizes the contract maturity of the available-for-sale securities the Company held as of March 31, 2020:
One year or less
64
%
After one year but within two years
36
%
Total
100
%
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 March 31, 2020 and December 31, 2019 were as follows:
 
March 31, 2020
 
Amortized Costs
 
Gross Unrealized Holding Gains
 
Gross Unrealized Holding Losses
 
Fair Value
Commercial paper
$
10,718

 
$
3

 
$
(9
)
 
$
10,712

Corporate notes/bonds
49,973

 
44

 
(158
)
 
49,859

U.S. Treasuries
4,510

 
36

 
—

 
4,546

U.S. Government agency securities
9,039

 
67

 
—

 
9,106

 
$
74,240

 
$
150

 
$
(167
)
 
$
74,223

 
December 31, 2019
 
Amortized Costs
 
Gross Unrealized Holding Gains
 
Gross Unrealized Holding Losses
 
Fair Value
Commercial paper
$
13,932

 
$
1

 
$
(2
)
 
$
13,931

Corporate notes/bonds
36,620

 
1

 
(24
)
 
36,597

U.S. Treasuries
4,513

 
—

 
(1
)
 
4,512

U.S. Government agency securities
9,786

 
—

 
(2
)
 
9,784

 
$
64,851

 
$
2

 
$
(29
)
 
$
64,824