Annual report pursuant to Section 13 and 15(d)

Property and Equipment, net (Details)

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Property and Equipment, net (Details) (USD $)
Dec. 31, 2012
Dec. 31, 2011
Summary of property and equipment, net    
Property and equipment, gross $ 1,537,740 $ 1,526,646
Accumulated depreciation and amortization (1,453,149) (1,377,960)
Property and equipment, net 84,591 148,686
Furniture and fixtures [Member]
   
Summary of property and equipment, net    
Property and equipment, gross 20,742 20,742
Laboratory equipment [Member]
   
Summary of property and equipment, net    
Property and equipment, gross 757,882 757,882
Leasehold improvements [Member]
   
Summary of property and equipment, net    
Property and equipment, gross 487,871 476,777
Office and computer equipment [Member]
   
Summary of property and equipment, net    
Property and equipment, gross $ 271,245 $ 271,245