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Marketable Securities (Tables)
 9 Months Ended
Sep. 30, 2020
Marketable Securities  
Summary of marketable debt securities, classified as available-for-sale

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gross Unrealized

 

 

Amortized

 

 

 

 

 

 

 

Fair

 

    

Cost

    

Gains

    

Losses

    

Value

 

 

(In thousands)

September 30, 2020

 

 

 

 

 

 

 

 

 

 

 

 

U.S. government and municipal obligations (maturing in one year or less)

 

$

79,969

 

$

12

 

$

 -

 

$

79,981

Corporate debt securities (maturing in one year or less)

 

 

101,462

 

 

11

 

 

(11)

 

 

101,462

Total Marketable Securities

 

$

181,431

 

$

23

 

$

(11)

 

$

181,443

 

 

 

 

 

 

 

 

 

 

 

 

 

December 31, 2019

 

 

 

 

 

 

 

 

 

 

 

 

U.S. government and municipal obligations (maturing in one year or less)

 

$

18,509

 

$

13

 

$

 —

 

$

18,522

Corporate debt securities (maturing in one year or less)

 

 

34,619

 

 

13

 

 

(3)

 

 

34,629

Total Marketable Securities

 

$

53,128

 

$

26

 

$

(3)

 

$

53,151