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11. Employee Benefit Plans (Details Narrative) (USD $)
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12 Months Ended | |
|---|---|---|
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Dec. 31, 2014
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Dec. 31, 2013
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| 401k Plan [Member] | ||
| Contribution to 401k plan |
$ 31,738us-gaap_DefinedBenefitPlanContributionsByEmployer / us-gaap_DefinedContributionPlanNameAxis = xbio_Plan401KMember |
$ 0us-gaap_DefinedBenefitPlanContributionsByEmployer / us-gaap_DefinedContributionPlanNameAxis = xbio_Plan401KMember |
| UK Plan [Member] | ||
| Contribution to 401k plan |
$ 108,439us-gaap_DefinedBenefitPlanContributionsByEmployer / us-gaap_DefinedContributionPlanNameAxis = xbio_UKPlanMember |
$ 129,353us-gaap_DefinedBenefitPlanContributionsByEmployer / us-gaap_DefinedContributionPlanNameAxis = xbio_UKPlanMember |
| X | ||||||||||
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- Definition
The increase in the fair value of plan assets from contributions made by the employer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Details
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