XML 21 R11.htm IDEA: XBRL DOCUMENT v3.20.2
Marketable Securities
 9 Months Ended
Sep. 30, 2020
Investments, Debt and Equity Securities [Abstract]  
Marketable securities

4. Marketable Securities

As of September 30, 2020, the fair value of available-for-sale marketable debt securities by type of security was as follows (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

September 30, 2020

 

 

 

 

 

 

Gross

 

 

Gross

 

 

 

 

 

 

Amortized

 

 

Unrealized

 

 

Unrealized

 

 

Fair

 

 

 

Cost

 

 

Gain

 

 

Loss

 

 

Value

Assets

 

 

 

 

 

 

 

 

 

 

 

 

Marketable securities:

 

 

 

 

 

 

 

 

 

 

 

 

U.S. Treasury notes

 

$

141,444

 

$

 8

 

$

 —

 

$

141,452

 

 

$

141,444

 

$

 8

 

$

 —

 

$

141,452

 

 

 

 

 

 

 

 

 

 

 

 

 

 

All available-for-sale securities have contractual maturities of less than one year. At December 31, 2019, the Company did not hold any marketable securities.