Quarterly report pursuant to Section 13 or 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 $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Indefinite-lived Intangible Assets [Line Items]      
Carrying value of indefinite-lived intangible asset $ 9,299,022us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill   $ 9,754,857us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Onco Hist [Member]      
Indefinite-lived Intangible Assets [Line Items]      
Carrying value of indefinite-lived intangible asset 9,300,000us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
/ us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis
= xbio_OncoHistMember
  9,750,000us-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