General form of registration statement for all companies including face-amount certificate companies

Related Party Transaction - Additional Information (Detail)

v2.4.1.9
Related Party Transaction - Additional Information (Detail)
9 Months Ended 12 Months Ended 1 Months Ended 0 Months Ended 1 Months Ended 9 Months Ended
Sep. 30, 2014
USD ($)
Jun. 30, 2014
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Dec. 31, 2008
USD ($)
Sep. 30, 2014
Claus Schalper
USD ($)
Dec. 31, 2013
Claus Schalper
USD ($)
Dec. 31, 2012
Claus Schalper
USD ($)
Sep. 30, 2014
Prof. Dr. Arne Skerra
USD ($)
Sep. 30, 2013
Prof. Dr. Arne Skerra
USD ($)
Dec. 31, 2013
Prof. Dr. Arne Skerra
USD ($)
Dec. 31, 2012
Prof. Dr. Arne Skerra
USD ($)
Jun. 30, 2014
Before Maturity Period
Jun. 30, 2014
After Maturity Period
Sep. 30, 2014
License Agreement
USD ($)
Dec. 31, 2013
License Agreement
USD ($)
Sep. 30, 2013
License Agreement
USD ($)
Dec. 31, 2012
License Agreement
USD ($)
Nov. 12, 2012
2012 Bridge Loan
Nov. 12, 2012
2012 Bridge Loan
Before Maturity Period
Nov. 12, 2012
2012 Bridge Loan
After Maturity Period
Sep. 30, 2014
2014 Bridge Loan
USD ($)
Sep. 30, 2014
2014 Bridge Loan
EUR (€)
Jun. 30, 2014
Tranche A
Sep. 30, 2014
Tranche A
USD ($)
Sep. 30, 2014
Tranche A
EUR (€)
Sep. 30, 2014
Tranche B
USD ($)
Sep. 30, 2014
Tranche B
EUR (€)
Sep. 30, 2014
Series C Financing
Related Party Transaction [Line Items]                                                          
Contingent accrual liability for research and licensing agreement $ 342,219us-gaap_LossContingencyAccrualAtCarryingValue   $ 373,059us-gaap_LossContingencyAccrualAtCarryingValue                       $ 342,219us-gaap_LossContingencyAccrualAtCarryingValue
/ us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis
= us-gaap_LicenseAgreementTermsMember
$ 373,059us-gaap_LossContingencyAccrualAtCarryingValue
/ us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis
= us-gaap_LicenseAgreementTermsMember
$ 366,799us-gaap_LossContingencyAccrualAtCarryingValue
/ us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis
= us-gaap_LicenseAgreementTermsMember
$ 358,121us-gaap_LossContingencyAccrualAtCarryingValue
/ us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis
= us-gaap_LicenseAgreementTermsMember
                     
Consulting agreement fees                 26,995us-gaap_ProfessionalAndContractServicesExpense
/ us-gaap_RelatedPartyTransactionAxis
= pirs_RelatedPartyOneMember
26,438us-gaap_ProfessionalAndContractServicesExpense
/ us-gaap_RelatedPartyTransactionAxis
= pirs_RelatedPartyOneMember
26,556us-gaap_ProfessionalAndContractServicesExpense
/ us-gaap_RelatedPartyTransactionAxis
= pirs_RelatedPartyOneMember
25,720us-gaap_ProfessionalAndContractServicesExpense
/ us-gaap_RelatedPartyTransactionAxis
= pirs_RelatedPartyOneMember
                                 
Maturity date                                     Dec. 31, 2013           Dec. 31, 2015 Dec. 31, 2015      
Interest rate                                       12.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= pirs_TwoThousandAndTwelveBridgeLoanMember
/ us-gaap_RelatedPartyTransactionAxis
= pirs_BeforeMaturityPeriodMember
18.00%us-gaap_DebtInstrumentInterestRateEffectivePercentage
/ us-gaap_DebtInstrumentAxis
= pirs_TwoThousandAndTwelveBridgeLoanMember
/ us-gaap_RelatedPartyTransactionAxis
= pirs_AfterMaturityPeriodMember
               
Bridge Loan of Available financing                                           2,525,600us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= pirs_TwoThousandAndFourteenBridgeLoanMember
2,000,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= pirs_TwoThousandAndFourteenBridgeLoanMember
  1,894,200us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= pirs_TrancheaMember
1,500,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= pirs_TrancheaMember
631,400us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= pirs_TrancheBMember
500,000us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
/ us-gaap_DebtInstrumentAxis
= pirs_TrancheBMember
 
Bridge loan financing, percentage called                                               67.00%us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
/ us-gaap_DebtInstrumentAxis
= pirs_TrancheaMember
         
Preferred share subscription   1,262,800us-gaap_PreferredStockShareSubscriptions                                                     1,262,800us-gaap_PreferredStockShareSubscriptions
/ us-gaap_DebtInstrumentAxis
= pirs_SeriescFinancingMember
Accrued interest rate                         12.00%us-gaap_RelatedPartyTransactionRate
/ us-gaap_RelatedPartyTransactionAxis
= pirs_BeforeMaturityPeriodMember
18.00%us-gaap_RelatedPartyTransactionRate
/ us-gaap_RelatedPartyTransactionAxis
= pirs_AfterMaturityPeriodMember
                             
Receivable from issuance of shares $ 121,801us-gaap_ReceivableFromShareholdersOrAffiliatesForIssuanceOfCapitalStock   $ 121,801us-gaap_ReceivableFromShareholdersOrAffiliatesForIssuanceOfCapitalStock $ 121,801us-gaap_ReceivableFromShareholdersOrAffiliatesForIssuanceOfCapitalStock $ 48,690us-gaap_ReceivableFromShareholdersOrAffiliatesForIssuanceOfCapitalStock $ 1,755us-gaap_ReceivableFromShareholdersOrAffiliatesForIssuanceOfCapitalStock
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pirs_PartyTwoMember
$ 1,755us-gaap_ReceivableFromShareholdersOrAffiliatesForIssuanceOfCapitalStock
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pirs_PartyTwoMember
$ 1,755us-gaap_ReceivableFromShareholdersOrAffiliatesForIssuanceOfCapitalStock
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pirs_PartyTwoMember