Quarterly report pursuant to Section 13 or 15(d)

3. Summary of Significant Accounting Policies (Details 5)

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3. Summary of Significant Accounting Policies (Details 5) (USD $)
 3 Months Ended
Mar. 31, 2015
Series D Preferred Stock Purchase Warrants $ 210,906pbio_WarrantyDerivativeLiability
Series D Preferred Stock Purchase Warrants beginning balance 159,875pbio_WarrantyDerivativeLiabilityBeginningBalance
Change in Fair Value 51,031pbio_ChangeInFairValue
Reclassification into equity   
Series D Preferred Stock Purchase Warrants Ending balance 210,906pbio_WarrantyDerivativeLiabilityBeginningBalance
Quoted Prices in active markets (Level 1)  
Series D Preferred Stock Purchase Warrants   
Significant Other Observable Inputs Level 2  
Series D Preferred Stock Purchase Warrants   
Significant Unobservable Inputs Level 3  
Series D Preferred Stock Purchase Warrants $ 210,906pbio_WarrantyDerivativeLiability
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= pbio_SignificantUnobservableInputsLevel3Member