Quarterly report pursuant to Section 13 or 15(d)

Fair Value (Tables)

v2.4.0.6
Fair Value (Tables)
6 Months Ended
Jun. 30, 2012
Fair Value  
Schedule of financial assets measured at fair value on a recurring basis

 

 

 

 

Assets at Fair Value as of June 30, 2012

 

 

 

Level 1

 

Level 2

 

Level 3

 

Total

 

Money market funds

 

$

15,893

 

$

 

$

 

$

15,893

 

Government-sponsored enterprise securities

 

 

80,085

 

 

80,085

 

Corporate bonds and commercial paper

 

 

105,352

 

 

105,352

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Total

 

$

15,893

 

$

185,437

 

$

 

$

201,330

 

 

 

 

Assets at Fair Value as of December 31, 2011

 

 

 

Level 1

 

Level 2

 

Level 3

 

Total

 

Money market funds

 

$

11,947

 

$

 

$

 

$

11,947

 

U. S. treasury bills

 

 

3,002

 

 

3,002

 

Government-sponsored enterprise securities

 

 

144,599

 

 

144,599

 

Corporate bonds and commercial paper

 

 

87,406

 

 

87,406

 

 

 

 

 

 

 

 

 

 

 

Total

 

$

11,947

 

$

235,007

 

$

 

$

246,954