Quarterly report pursuant to Section 13 or 15(d)

Warrant Liability (Details Textual)

v2.4.0.8
Warrant Liability (Details Textual) (USD $)
6 Months Ended 1 Months Ended 3 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended 1 Months Ended 2 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Apr. 30, 2012
Institutional Investor [Member]
Common Stock [Member]
Private Placement [Member]
Mar. 31, 2013
Series A Warrants [Member]
Dec. 31, 2013
Series A Warrants [Member]
Apr. 30, 2012
Series A Warrants [Member]
Institutional Investor [Member]
Apr. 09, 2012
Series A Warrants [Member]
Institutional Investor [Member]
Dec. 31, 2012
Series B Warrants [Member]
Apr. 30, 2012
Series B Warrants [Member]
Institutional Investor [Member]
Apr. 09, 2012
Series B Warrants [Member]
Institutional Investor [Member]
Mar. 15, 2011
Deerfield Warrant [Member]
Mar. 31, 2013
Deerfield Warrant [Member]
Apr. 30, 2012
Deerfield Warrant [Member]
Class of Warrant or Right [Line Items]                          
Warrants To Purchase Common Stock Shares           6,517,648     6,517,648   6,000,000    
Class of Warrant or Right, Exercise Price of Warrants or Rights             $ 1.15 $ 0.85   $ 0.85 $ 1.57   $ 1.25
Debt Instrument, Increase (Decrease), Net, Total                       $ 7,500,000  
Stock Issued During Period, Shares, New Issues     6,517,648                    
Class of Warrant or Right Exercised During Period       1,109,010       5,761,765       6,000,000  
Proceeds from Warrant Exercises $ 0 $ 1,275,000   $ 1,275,000                  
Class Of Warrant Or Right Subject To Expiry         5,408,638                
Investment Warrants Expiration Date         Apr. 30, 2018     Oct. 31, 2012          
Class Of Warrant Or Right Expiry Term           six-years     six-month   six-years    
Class Of Warrant Or Right Expired During Period               755,883