Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v2.4.0.8
Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
 0 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Basis Of Presentation And Significant Accounting Policies [Line Items]        
Impairment of indefinite-lived intangible asset     $ 0 $ 0
Impairment of goodwill     0 0
Potentially dilutive non-participating securities 22,960,777 25,435,513    
Goodwill or intangible assets recognized     $ 0  
Laboratory Equipment [Member]
        
Basis Of Presentation And Significant Accounting Policies [Line Items]        
Estimated Useful Life     3 years  
Laboratory Equipment [Member] | Before Amendment [Member]
        
Basis Of Presentation And Significant Accounting Policies [Line Items]        
Estimated Useful Life     4 years  
Office and Computer Equipment [Member]
        
Basis Of Presentation And Significant Accounting Policies [Line Items]        
Estimated Useful Life     3 years  
Office and Computer Equipment [Member] | Before Amendment [Member]
        
Basis Of Presentation And Significant Accounting Policies [Line Items]        
Estimated Useful Life     4 years  
Leasehold Improvements [Member]
        
Basis Of Presentation And Significant Accounting Policies [Line Items]        
Estimated Useful Life     5 years  
Leasehold Improvements [Member] | Before Amendment [Member]
        
Basis Of Presentation And Significant Accounting Policies [Line Items]        
Estimated Useful Life     4 years  
Xenetic UK [Member]
        
Basis Of Presentation And Significant Accounting Policies [Line Items]        
Issuance of new shares in exchange     56  
Number of subsidiary shares exchanged for new shares     175