Quarterly report pursuant to Section 13 or 15(d)

4. Property and Equipment, net (Details)

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4. Property and Equipment, net (Details) - USD ($)
Jun. 30, 2015
Dec. 31, 2014
Property, Plant and Equipment [Line Items]    
Property and equipment - at cost $ 338,107 $ 586,113
Less accumulated depreciation (255,292) (466,664)
Property and equipment - net 82,815 119,449
Laboratory Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - at cost 255,813 254,150
Office and Computer Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - at cost 35,190 189,459
Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - at cost 26,841 92,354
Furniture and Fixtures [Member]    
Property, Plant and Equipment [Line Items]    
Property and equipment - at cost $ 20,263 $ 50,150