Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2012

Assets Measured At Fair Value

The following tables present the Company’s assets that are measured at fair value on a recurring basis:

	June 30, 2012
(in thousands)	Quoted Market Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value Measurements
Short-term investments:
U.S. government and agency securities	$	—	$	3,855	$	—	$	3,855
Corporate obligations		—		20,810		—		20,810
Other fixed income securities		—		418		—		418
International securities	$	—		10,234	$	—		10,234
Total	$	—	$	35,317	$	—	$	35,317

	December 31, 2011
(in thousands)	Quoted Market Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total Fair Value Measurements
Short-term investments:
U.S. government and agency securities	$	—	$	3,858	$	—	$	3,858
Corporate obligations		—		5,122		—		5,122
Other fixed income securities		—		545		—		545
International securities	$	—		1,526	$	—		1,526
Total	$	—	$	11,051	$	—	$	11,051