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Shareholders' Equity (Details) (USD $)
 0 Months Ended 12 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 0 Months Ended 12 Months Ended 12 Months Ended 3 Months Ended 12 Months Ended 12 Months Ended 83 Months Ended 0 Months Ended 3 Months Ended 12 Months Ended 0 Months Ended
Jul. 22, 2011
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Employee Stock Option [Member]
Dec. 31, 2010
Employee Stock Option [Member]
Dec. 31, 2012
Employee Stock Option [Member]
Apr. 04, 2011
Employee Stock Option [Member]
Jun. 30, 2010
Definitive Securities Purchase Agreement [Member]
Jun. 01, 2010
Fullbright Finance Limited [Member]
Dec. 31, 2011
Private Placement [Member]
Jul. 22, 2011
Private Placement [Member]
Jul. 22, 2011
Underwriting Offering [Member]
Feb. 02, 2012
Aspire Capital Purchase Agreement [Member]
Sep. 30, 2011
Aspire Capital Purchase Agreement [Member]
Sep. 28, 2011
Aspire Capital Purchase Agreement [Member]
Feb. 18, 2010
IPO [Member]
Mar. 15, 2010
Warrant Exercise RimAsia [Member]
Jun. 07, 2010
Commerce Court Purchase Agreement [Member]
May 19, 2010
Commerce Court Purchase Agreement [Member]
Mar. 15, 2010
Commerce Court Purchase Agreement [Member]
May 17, 2010
Convertible Preferred Stock [Member]
Warrant Exercise RimAsia [Member]
Dec. 07, 2010
Common Stock [Member]
Sep. 30, 2010
Common Stock [Member]
Jul. 27, 2010
Common Stock [Member]
Jul. 02, 2010
Common Stock [Member]
Jun. 01, 2010
Fullbright Finance Limited [Member]
May 19, 2010
Commerce Court Purchase Agreement [Member]
Dec. 31, 2011
2009 Equity Plan [Member]
Employee Stock Option [Member]
Oct. 14, 2011
2009 Equity Plan [Member]
Employee Stock Option [Member]
Jan. 18, 2011
2009 Equity Plan [Member]
Employee Stock Option [Member]
Jun. 02, 2010
2009 Equity Plan [Member]
Employee Stock Option [Member]
Oct. 29, 2009
2009 Equity Plan [Member]
Employee Stock Option [Member]
Dec. 31, 2011
2003 Equity Plan [Member]
Employee Stock Option [Member]
Dec. 31, 2011
Non US Equity Plan [Member]
Dec. 31, 2010
Non US Equity Plan [Member]
Dec. 31, 2011
Non US Equity Plan [Member]
Employee Stock Option [Member]
Dec. 31, 2011
Non US Equity Plan [Member]
Employee Stock Option [Member]
Oct. 14, 2011
Non US Equity Plan [Member]
Employee Stock Option [Member]
Jun. 02, 2010
Non US Equity Plan [Member]
Employee Stock Option [Member]
Dec. 31, 2011
Warrants [Member]
Dec. 31, 2010
Warrants [Member]
Oct. 31, 2018
Warrants [Member]
Sep. 30, 2010
Warrants [Member]
Common Stock [Member]
Sep. 30, 2011
Warrants [Member]
Common Stock [Member]
Dec. 31, 2011
Minimum [Member]
Warrants [Member]
Dec. 31, 2011
Maximum [Member]
Warrants [Member]
Mar. 31, 2012
Placement Agent [Member]
Common Stock [Member]
Dec. 31, 2011
Placement Agent [Member]
Common Stock [Member]
Nov. 16, 2010
Underwriting Agreement [Member]
Common Stock [Member]
Allocated Share-based Compensation Expense   $ 2,791,100 $ 567,700 $ 6,923,000 $ 6,324,500                                                                     $ 282,200 $ 474,900                
Adjustments to Additional Paid in Capital, Share-based Compensation, Nonvested Shares, Requisite Service Period Recognition                                                                   6,194,100 6,191,800         269,100 450,800                
Adjustments to Additional Paid in Capital, Share-based Compensation, Nonvested Shares, Requisite Service Period Recognition                                                                   4,034,900           91,500                  
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition                                                                   3,995,600           73,900                  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition                                                                   1.82           1.04                  
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options                                                                   39,300           17,600                  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross                                                       23,750,000         2,500,000                                
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross             1,500,000                                                                                    
Common Stock, Shares Authorized   500,000,000 500,000,000                                                                                            
Common Stock, Par or Stated Value Per Share   $ 0.001 $ 0.001                                                                                            
Proceeds from Issuance of Private Placement   2,250,000               6,300,000                                                                              
Shares, Issued   5,157,732               4,938,125       990,099                                                                      
Sale of Stock, Price Per Share                   $ 1.28   $ 1.20       $ 1.35   $ 2.63                                                              
Shares Purchased By Director                   390,625                                                                              
Shares Purchased By Chief Medical And Scientific Officer                   78,125                                                                              
Units offered               2,325,582     13,750,000                                                                            
Class of Warrant or Right, Number of Securities Called by Warrants or Rights               581,394       0         1,000,000                 400,000                                              
Class of Warrant or Right, Exercise Price of Warrants or Rights                 1.75     1.45         1.75                                                     0.78 0.56 7      
Procceds From Sale Of Stock Gross 16,500,000             5,000,000               6,800,000                                                                  
Procceds From Sale Of Stock Net 14,800,000                                 1,744,000                                                              
Committment Value Under Purchase Agreement                             20,000,000     1,800,000 20,000,000                                                            
Term Of Agreement In Months                             24         24                                                          
Discount Applied To Weighted Average Price                             5.00%         5.00%                                                          
Committed Shares Under Purchase Agreement                         15,282,502   18,747,906                                                                    
Stock Issued During Period, Value, New Issues   21,152,682 21,425,538                         5,750,000                                                                  
Fees and Commissions                               941,000                                                                  
Proceeds from Warrant Exercises                 700,000               1,750,000           468,000                                                    
Partners' Capital Account, Units, Sold in Public Offering                                                                                                 6,337,980
Public Offering Price                                                                                                 $ 1.45
Proceeds from Issuance Initial Public Offering                                                                                                 8,100,000
Series D Warrant Number Of Securities Called By Warrants                                 4,000,000                                                                
Conversion of Stock, Shares Converted                                         8,177,512                                                        
Conversion of Stock, Shares Issued                                         9,086,124                                                        
Preferred Stock, Conversion Basis                                         conversion rate of 0.90 shares of Series C Preferred Stock for 1.0 shares of the Company’s common stock                                                        
Common Stock Shares Settlement Amount                                                     685,226                                            
Threshold Price                                   $ 3.00                                                              
Price Per Unit               $ 2.15                                                                                  
Stock Issued                                                                                             340,000    
Common Stock, Shares, Issued   109,329,587 64,221,130                                                                                         93,023  
Investment Warrants, Exercise Price                                                                                               $ 2.69 $ 1.85
Relinquishment related to common share right                                           407,626                                                      
Research and Development Arrangement, Contract to Perform for Others, Compensation Earned                                           656,300                                                      
Warrants and Rights Outstanding                                                                                               4,500,000  
Stock Issued During Period, Shares, Restricted Stock Award, Gross   3,467,000 339,000                                         150,000                                                  
Stock Issued During Period, Value, Restricted Stock Award, Gross   3,580,600 569,500                                         298,500                                                  
Research and Development Arrangement, Contract to Perform for Others, Costs Incurred, Gross                                                 75,000                                                
Stock Issued During Period, Shares, Conversion of Convertible Securities                                                                                     600,000            
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized                                                         23,750,000 17,750,000 13,750,000 9,750,000           5,700,000 8,700,000                    
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period                                                                         5,700,000                        
Share-based Compensation Arrangement by Share-based Payment Award, Other Share Increase (Decrease)                                                                       6,000,000                          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number   15,043,505   605,000                                                                                          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number   9,555,631   500,000   500,000                                                                                      
Share-based Compensation Arrangement by Share-based Payment Award, Plan Modification, Incremental Compensation Cost       $ 722,900                                                                                          
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value       $ 1.06 $ 1.59                                                                                        
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Method Used       Black-Scholes option pricing model                                                                                          
Class of Warrant or Right, Outstanding   37,389,825                                                                           37,389,825                  
Expiration date of warrants                                                                                   October 2018