Quarterly report pursuant to Section 13 or 15(d)

Debt - Future Principal Payments on Debt (Details)

v2.4.0.8
Debt - Future Principal Payments on Debt (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Line Of Credit Facility [Line Items]    
Total future principal payments $ 20,116 $ 17,925
Hercules Term Loan
   
Line Of Credit Facility [Line Items]    
Total future principal payments 18,900  
Convertible Notes Payable
   
Line Of Credit Facility [Line Items]    
2014     
2015 3,333  
2016 10,900  
2017 8,000  
2018 667  
Total future principal payments 22,900  
Convertible Notes Payable | Hercules Term Loan
   
Line Of Credit Facility [Line Items]    
2014     
2015 3,333  
2016 8,000  
2017 8,000  
2018 667  
Total future principal payments 20,000  
Convertible Notes Payable | Magna Convertible Notes
   
Line Of Credit Facility [Line Items]    
2014     
2016 2,900  
Total future principal payments $ 2,900