Annual report pursuant to Section 13 and 15(d)

The Company - Additional Information (Detail)

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The Company - Additional Information (Detail)
12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Xenetic UK [Member]
Jan. 23, 2014
Subsequent Event [Member]
Jan. 23, 2014
Subsequent Event [Member]
Xenetic UK [Member]
Description Of Business [Line Items]          
Issuance of new shares in exchange     56 56  
Number of subsidiary shares exchanged for new shares     175   175
Common stock newly issued during the period       132,545,504  
Common stock, shares issued 130,575,516 130,520,137   136,045,504  
Common stock, shares outstanding 119,887,322 119,831,943   136,045,504  
Percentage of shares owned by former shareholders of the subsidiary         97.00%