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Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2012

Assets and liabilities measured at fair value on a recurring basis


	Level 1		Level 2		Level 3		Total
Cash equivalents:
Money market funds	$	35,309	$	—	$	—	$	35,309
Commercial paper		—		40,932		—		40,932
Short-term investments:
Commercial paper		—		36,648		—		36,648
Corporate notes and bonds		—		100,814		—		100,814
U.S. government agency securities		—		2,023		—		2,023

Total	$	35,309	$	180,417	$	—	$	215,726

- Definition

Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3).

+ References+ Details