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Marketable Securities (Tables)
 9 Months Ended
Sep. 30, 2018
Marketable Securities  
Summary of investments

The following table summarizes the Company’s investments as of December 31, 2017 (in thousands):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Gross

 

 

 

 

 

Amortized

 

Unrealized

 

Estimated

 

    

Cost

    

Gains

    

Losses

    

Fair Value

Marketable securities available-for-sale:

 

 

 

 

 

 

 

 

 

 

 

 

U.S. Treasury obligations

 

$

1,500

 

$

 —

 

$

(2)

 

$

1,498

Total available-for-sale securities

 

$

1,500

 

$

 —

 

$

(2)

 

$

1,498