Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details)

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Stockholders' Equity (Details) (USD $)
1 Months Ended 6 Months Ended 1 Months Ended 12 Months Ended 3 Months Ended 1 Months Ended 2 Months Ended 1 Months Ended
Sep. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Apr. 09, 2012
Mar. 15, 2011
Apr. 30, 2013
Oxford [Member]
Dec. 31, 2012
Accrued Liabilities [Member]
Mar. 31, 2013
Series A Warrants [Member]
Apr. 09, 2012
Series A Warrants [Member]
Oct. 31, 2012
Series B Warrants [Member]
Sep. 30, 2012
Series B Warrants [Member]
Apr. 09, 2012
Series B Warrants [Member]
Mar. 31, 2013
Deerfield Warrant [Member]
Apr. 30, 2012
Deerfield Warrant [Member]
Apr. 30, 2012
Institutional Investor [Member]
Stockholders' Deficit (Textual) [Abstract]                                
Net issuance of common stock             144,499                  
Number of common stock issued upon exercise of warrants             287,356   1,109,010   4,627,941 1,133,824        
Gross proceeds   $ 1,275,000              $ 1,275,000   $ 3,934,000 $ 964,000        
Class of warrant or right exercised                           6,000,000    
Deerfield warrants reduction of our outstanding indebtedness                           7,500,000    
Premium allocated to fair value option agreement               1,700,000                
Purchase and sale of warrants of common stock under subscription agreement                   6,517,648     6,517,648      
Gross proceeds from sale of institutional investor                               5,540,000
Exercise price of warrant per share           1.57       1.15     0.85   1.25  
Stockholders' Deficit (Additional Textual) [Abstract]                                
Number of common stock sold 3,400,000                              
Purchase price of sold common stock 4,250,000                              
Per share price of sold common stock $ 1.25                              
Allocated to fair value option agreement       $ 0.50                        
Purchase and sale of shares of common stock under subscription agreements         6,517,648                      
Payment of stock issuance costs   500,000                            
Fair value of warrants   $ 2,900,000