Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies - Additional Information (Detail)

v2.4.1.9
Commitments and Contingencies - Additional Information (Detail)
 0 Months Ended 3 Months Ended
Dec. 23, 2014
USD ($)
Dec. 23, 2014
EUR (€)
Mar. 31, 2015
USD ($)
Mar. 31, 2015
EUR (€)
Mar. 31, 2015
Out License Fee [Member]
USD ($)
Mar. 31, 2015
TUM [Member]
Out License Fee [Member]
USD ($)
Mar. 31, 2015
TUM [Member]
Out License Fee [Member]
EUR (€)
Loss Contingencies [Line Items]              
Out-License Fee amount         $ 400,000us-gaap_ContractualObligation
/ us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis
= pirs_OutLicenseFeeMember 		$ 3,400,000us-gaap_ContractualObligation
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pirs_TumMember
/ us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis
= pirs_OutLicenseFeeMember 		 
Reserved liability           327,937us-gaap_RelatedPartyDepositLiabilities
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pirs_TumMember
/ us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis
= pirs_OutLicenseFeeMember 		271,000us-gaap_RelatedPartyDepositLiabilities
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= pirs_TumMember
/ us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis
= pirs_OutLicenseFeeMember
Counterclaim amount filed 3,060,827us-gaap_LossContingencyDamagesSoughtValue 2,529,400us-gaap_LossContingencyDamagesSoughtValue          
Claims and counterclaims amount     $ 4,235,350us-gaap_LossContingencyDamagesAwardedValue € 3,500,000us-gaap_LossContingencyDamagesAwardedValue