Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies (Details Textual)

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Commitments and Contingencies (Details Textual) (USD $)
0 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 2 Months Ended 9 Months Ended
Nov. 14, 2011
Mar. 15, 2011
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Dec. 31, 2012
Mar. 31, 2013
Deerfield Warrant [Member]
Sep. 30, 2013
Deerfield Warrant [Member]
Apr. 30, 2012
Deerfield Warrant [Member]
Mar. 15, 2011
Deerfield Warrant [Member]
Repayments of Debt                 $ 7,500,000    
Gain on Reduction of Debt on Exercise of Warrants               1,900,000      
Debt Instrument, Face Amount   20,000,000                  
Debt Instrument, Interest Rate, Stated Percentage   8.50%                  
Debt Instrument, Frequency of Periodic Payment   payable quarterly, and was originally repayable over five years,                  
Percentage of Principle Amount Due in Year One   10.00%                  
Percentage of Principle Amount Due in Year Two   15.00%                  
Percentage of Principle Amount Due in Year Three   25.00%                  
Warrants Periodic Payments   6 years                  
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Number of Shares   6,000,000                  
Class of Warrant or Right, Exercise Price of Warrants or Rights   1.57               1.25 1.57
Class of Warrant or Right Adjusted Exercise Price of Warrants or Rights   1.25                  
Royalty Revenue   3,000,000 0 1,228,000 1,424,000 3,816,000          
Debt Instrument, Unamortized Discount   3,000,000                  
Amortization of Deferred Loan Origination Fees, Net   500,000                  
Financial Instruments, Owned, Corporate Equities, at Fair Value   5,500,000                  
Amortization of Financing Costs and Discounts   9,000,000                  
Royalty Liability 5,000,000                    
Reduction in Principal Amount of Credit Facility 10,000,000                    
Debt Instrument, Periodic Payment, Principal 2,500,000                    
Long Term Debt Remaining Payment Period 4 years                    
Remaining Long Term Debt to be Retired 10,000,000                    
Long Term Debt Final Principal Payment     2,500,000   2,500,000            
Deferred Sales Inducements, Net     20,000,000 15,300,000 20,000,000 15,300,000          
Payments for Royalties         $ 3,000,000   $ 1,800,000