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Marketable Securities (Tables)
6 Months Ended
Jun. 30, 2018
Marketable Securities  
Summary of marketable securities, classified as available-for-sale

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Amortized

 

Gross Unrealized

 

 

 

 

    

Cost

    

Gains

    

Losses

    

Fair Value

 

 

(In thousands)

June 30, 2018

 

 

 

 

 

 

 

 

 

 

 

 

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

 

$

19,362

 

$

 1

 

$

 —

 

$

19,363

Corporate debt securities (maturing in one year or less)

 

 

50,759

 

 

 —

 

 

(7)

 

 

50,752

Total Marketable Securities

 

$

70,121

 

$

 1

 

$

(7)

 

$

70,115

 

 

 

 

 

 

 

 

 

 

 

 

 

December 31, 2017

 

 

 

 

 

 

 

 

 

 

 

 

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

 

$

26,164

 

$

 3

 

$

(9)

 

$

26,158

Corporate debt securities (maturing in one year or less)

 

 

73,007

 

 

 1

 

 

(27)

 

 

72,981

Total Marketable Securities

 

$

99,171

 

$

 4

 

$

(36)

 

$

99,139