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Marketable Securities, Available for Sale (Tables)
9 Months Ended
Sep. 30, 2016
Investments Debt And Equity Securities [Abstract]  
Summary of Available-for-Sale Marketable Securities

The following is a summary of available-for-sale marketable securities (in thousands):

 

September 30, 2016

 

Amortized

Cost

 

 

Unrealized

Gain

 

 

Unrealized

Loss

 

 

Market

Value

 

U.S. treasuries

 

$

18,783

 

 

$

2

 

 

 

 

 

$

18,785

 

Certificates of deposit

 

 

10,205

 

 

 

 

 

 

 

 

 

10,205

 

 

 

$

28,988

 

 

$

2

 

 

$

 

 

$

28,990

 

 

December 31, 2015

 

Amortized

Cost

 

 

Unrealized

Gain

 

 

Unrealized

Loss

 

 

Market

Value

 

U.S. treasuries

 

$

7,027

 

 

$

 

 

$

8

 

 

$

7,019

 

Corporate bonds

 

 

1,000

 

 

 

 

 

 

 

 

 

1,000

 

Certificates of deposit

 

 

15,239

 

 

 

 

 

 

 

 

 

15,239

 

 

 

$

23,266

 

 

$

 

 

$

8

 

 

$

23,258