Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Measurements [Abstract]

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis, Valuation Techniques [Table Text Block]

The following table sets forth by level within the fair value hierarchy the Company’s financial assets and liabilities that were accounted for at fair value on a recurring basis as of December 31, 2012, and December 31, 2011 (in thousands):

	December 31, 2012
	Fair Value Measurements Using Fair Value Hierarchy
	Level 1		Level 2		Level 3
Warrant derivative liabilities	$	—	$	—	$	101.2
Contingent consideration	—		—		7,550.0

	December 31, 2011
	Fair Value Measurements Using Fair Value Hierarchy
	Level 1		Level 2		Level 3
Money market investments	$	2,497.4	$	—	$	—
Embedded derivative liabilities	—		—		391.7
Warrant derivative liabilities	—		—		82.7
Contingent consideration	—		—		3,130.0

Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]

For those financial instruments with significant Level 3 inputs, the following table summarizes the activity for the year endedDecember 31, 2012 by type of instrument (in thousands):

	Year Ended
	December 31, 2012
	Embedded Derivatives			Warrants		Contingent Consideration
Beginning liability balance	$	391.7		$	82.7	$	3,130.0
Change in fair value recorded in earnings	(391.7		)	18.5		4,420.0
Ending liability balance	$	—		$	101.2	$	7,550.0