Goodwill

v2.4.0.6

Goodwill	12 Months Ended
	Dec. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Goodwill Goodwill represents the excess of the purchase price over the estimated fair value of net tangible and identifiable intangible assets acquired in business combinations. Our annual impairment assessment is performed as of the fourth quarter of each year, and an assessment is performed at other times if an event occurs or circumstances change that would more likely than not reduce the fair value of the asset below its carrying value. At the date of our annual assessment for 2012 and 2011, the fair value of our single reporting unit substantially exceeded its carrying value and therefore was not at risk of failing step one of ASC 350-20, Goodwill. As of December 31, 2012, there were no indicators of impairment and no impairment loss was recorded for goodwill during the years ended December 31, 2012, 2011 and 2010. The cumulative balance of goodwill impairment that has been recorded since the Merger is $4,766,190, which was recognized during the year ended December 31, 2008. During the year ended December 31, 2012, with the release of our deferred income tax valuation allowance, we reduced goodwill by $19,491 related to the subsequent exercise of certain stock options and vesting of certain restricted stock units that were recorded at fair value in connection with the Merger. There were no changes in the carrying value of our goodwill during the year ended December 31, 2011.