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Partnership Agreement with Lorem Vascular (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Partnership Agreement [Line Items]  
Gross profits percentage (in hundredths) 30.00%
Lorem Vascular [Member]
  
Partnership Agreement [Line Items]  
Number of board members 1
Lorem Vascular [Member] | Exclusive License [Member]
  
Partnership Agreement [Line Items]  
Total commitment $ 500
Period of exclusive license 30 years
Lorem Vascular [Member] | Equity Purchases [Member]
  
Partnership Agreement [Line Items]  
Total commitment 24
Shares of unregistered stock purchased (in shares) 8
Equity purchase price (in dollars per share) $ 3.00
Number of installments in equity purchases 2
Lorem Vascular [Member] | Equity Purchases [Member] | Installment One [Member]
  
Partnership Agreement [Line Items]  
Total commitment 12
Period of installment payment (in days) 7 days
Lorem Vascular [Member] | Equity Purchases [Member] | Installment Two [Member]
  
Partnership Agreement [Line Items]  
Total commitment 12
Period of installment payment (in days) 60 days
Lorem Vascular [Member] | Product Purchase Commitment [Member]
  
Partnership Agreement [Line Items]  
Total commitment 7
First purchase commitment 2
Second purchase commitment $ 5