Fair Value Measurements

12 Months Ended

Dec. 31, 2011

Fair Value Measurements [Abstract]

Fair Value Measurements

10. Fair Value Measurements

The fair value hierarchy prioritizes observable and unobservable inputs used to measure fair value into three broad levels:

Level 1: Observable inputs such as quoted prices (unadjusted) in active markets for identical securities.

Level 2: Inputs other than quoted prices that may be observable for similar securities. These may include quoted prices for similar securities in active or markets that are not active.

Level 3: Unobservable inputs that reflect the reporting entity’s own assumptions

The following table summarizes the financial assets that we measured at fair value as of December 31, 2011 and 2010.

	2011		Input Level	2010		Input Level
Cash and money market funds	$	135,843	Level 1	$	98,514	Level 1
Indemnity fund-restricted money market funds		—	Level 1		115,568	Level 1
Short-term investments		27,446	Level 2		—	Level 2
	$	163,289		$	214,082

The Company did not have any non-financial assets or liabilities that were measured or disclosed at fair value for the years ended December 31, 2011 and 2010. No transfers occurred between Level 1and Level 2 assets for the years ended December 31, 2011 and 2010. It is not practicable to estimate the fair value of the Company’s convertible debt. However, it is likely that the fair value of the debt would be materially less than the carrying value of the debt because the conversion price of $2.50 is higher than the Company’s stock price of $0.24 as of December 31, 2011.