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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
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0 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Mar. 31, 2014
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Mar. 31, 2013
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Mar. 31, 2014
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Mar. 31, 2013
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Mar. 31, 2014
Laboratory Equipment [Member]
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Mar. 31, 2014
Laboratory Equipment [Member]
Before Amendment [Member]
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Mar. 31, 2014
Office and Computer Equipment [Member]
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Mar. 31, 2014
Office and Computer Equipment [Member]
Before Amendment [Member]
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Mar. 31, 2014
Leasehold Improvements [Member]
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Mar. 31, 2014
Leasehold Improvements [Member]
Before Amendment [Member]
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Jan. 23, 2014
Xenetic UK [Member]
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Mar. 31, 2014
Xenetic UK [Member]
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| Basis Of Presentation And Significant Accounting Policies [Line Items] | ||||||||||||
| Issuance of new shares in exchange | 56 | 56 | ||||||||||
| Number of subsidiary shares exchanged for new shares | 175 | 175 | ||||||||||
| Impairment of indefinite-lived intangible asset | $ 0 | $ 0 | ||||||||||
| Impairment of goodwill | 0 | 0 | ||||||||||
| Estimated Useful Life | 3 years | 4 years | 3 years | 4 years | 5 years | 4 years | ||||||
| Potentially dilutive non-participating securities | 22,808,663 | 25,241,195 | ||||||||||
| Goodwill or intangible assets recognized | $ 0 | |||||||||||