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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2016
Fair Value Disclosures [Abstract]  
Fair Value Hierarchy for Financial Assets Measured at Fair Value on Recurring Basis

The following table represents the fair value hierarchy for our financial assets (cash equivalents and marketable securities) measured at fair value on a recurring basis as of September 30, 2016 and December 31, 2015 (in thousands):

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

 

Total

 

September 30, 2016

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

$

19,637

 

 

$

-

 

 

$

-

 

 

$

19,637

 

U.S. Treasuries

 

-

 

 

 

6,527

 

 

 

-

 

 

 

6,527

 

U.S. Government agency securities

 

-

 

 

 

48,870

 

 

 

-

 

 

 

48,870

 

Corporate debt securities

 

-

 

 

 

32,133

 

 

 

-

 

 

 

32,133

 

Total

$

19,637

 

 

$

87,530

 

 

$

-

 

 

$

107,167

 

 

 

Level 1

 

 

Level 2

 

 

Level 3

 

 

Total

 

December 31, 2015

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Money market funds

$

21,193

 

 

$

-

 

 

$

-

 

 

$

21,193

 

U.S. Government agency securities

 

-

 

 

 

17,622

 

 

 

-

 

 

 

17,622

 

Corporate debt securities

 

-

 

 

 

152,749

 

 

 

 

 

 

 

152,749

 

Total

$

21,193

 

 

$

170,371

 

 

$

-

 

 

$

191,564