Annual report pursuant to Section 13 and 15(d)

12. Commitments (Details Narrative)

v2.4.1.9
12. Commitments (Details Narrative) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]    
Prepaid rent $ 120,299us-gaap_PrepaidRent  
Contribution to leasehold improvements 89,074xbio_LeaseholdImprovementPayable  
Rent expense $ 172,821us-gaap_LeaseAndRentalExpense $ 280,606us-gaap_LeaseAndRentalExpense