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Agreement with Lorem Vascular (Details) - Lorem Vascular [Member]
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2013
USD ($)
Installment
$ / shares
shares
Partnership Agreement [Line Items]  
Percentage of gross profits required to pay as per agreement 30.00%
Exclusive License [Member]  
Partnership Agreement [Line Items]  
Total commitment $ 500.0
Equity Purchases [Member]  
Partnership Agreement [Line Items]  
Total commitment $ 24.0
Shares of unregistered stock purchased (in shares) | shares 8.0
Equity purchase price (in dollars per share) | $ / shares $ 3.00
Number of installments in equity purchases | Installment 2
Product Purchase Commitment [Member]  
Partnership Agreement [Line Items]  
First purchase commitment $ 1.8