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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2014
Fair Value Measurements [Abstract]  
Fair Value, Assets 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 three months ended March 31, 2014 by type of instrument (in thousands):
 
 
 
Three Months Ended
 
 
March 31, 2014
 
 
Warrants
 
Acquisition-Related Contingent Consideration
Beginning liability balance
 
$
23.2

 
$
9,450.0

Change in fair value recorded in earnings
 

 
190.0

Ending liability balance
 
$
23.2

 
$
9,640.0

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 March 31, 2014, and December 31, 2013 (in thousands):
 
 
March 31, 2014
 
Fair Value Measurements Using Fair Value Hierarchy
 
Level 1
 
Level 2
 
Level 3
Warrant derivative liabilities
$

 
$

 
$
23.2

Acquisition-related contingent consideration

 

 
9,640.0