Annual report pursuant to Section 13 and 15(d)

6. Goodwill and Indefinite-Lived Intangible Assets (Details Narrative)

v2.4.1.9
6. Goodwill and Indefinite-Lived Intangible Assets (Details Narrative) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Indefinite-lived Intangible Assets [Line Items]    
Carrying value of indefinite-lived intangible asset $ 9,754,857us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill $ 10,318,001us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Onco Hist [Member]    
Indefinite-lived Intangible Assets [Line Items]    
Fair value of indefinite-lived intangible asset 14,610,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillFairValueDisclosure
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= xbio_OncoHistMember
10,400,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwillFairValueDisclosure
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= xbio_OncoHistMember
Carrying value of indefinite-lived intangible asset 9,750,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= xbio_OncoHistMember
10,320,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= xbio_OncoHistMember
Impairment of indefinite-lived intangible asset $ 0us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= xbio_OncoHistMember
$ 0us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= xbio_OncoHistMember