Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Summary of Significant Accounting Policies - Fair Value, Level 3 Rollforward (Details)

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Basis of Presentation and Summary of Significant Accounting Policies - Fair Value, Level 3 Rollforward (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 8,178 $ 0
Reclassification to equity (5,575)  
Change in value 132 0
Elimination of Row 44 Series C-1 Preferred Warrants held by AIA (2,735)  
Additions 1,365 4,602
Ending balance 1,365 4,602
Series C preferred warrants
   
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 5,482 0
Reclassification to equity (2,879)  
Change in value 132 0
Elimination of Row 44 Series C-1 Preferred Warrants held by AIA (2,735)  
Additions 0 4,323
Ending balance 0 4,323
Common stock warrants
   
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 2,696 0
Reclassification to equity (2,696)  
Change in value 0 0
Elimination of Row 44 Series C-1 Preferred Warrants held by AIA 0  
Additions 0 279
Ending balance 0 279
Earn-Out Consideration [Member]
   
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 0 0
Reclassification to equity 0  
Change in value 0 0
Elimination of Row 44 Series C-1 Preferred Warrants held by AIA 0  
Additions 1,365 0
Ending balance $ 1,365 $ 0