|
Related party interest expense concerning the Bridge loan (Detail) (USD $)
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9 Months Ended |
12 Months Ended |
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Sep. 30, 2014
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Sep. 30, 2013
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Dec. 31, 2013
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Dec. 31, 2012
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| Short-term Debt [Line Items] |
|
|
|
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| Interest expense related party |
$ 204,110us-gaap_InterestExpenseRelatedParty
|
$ 186,044us-gaap_InterestExpenseRelatedParty
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|
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| Orbimed Private Investments III, LP |
|
|
|
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| Short-term Debt [Line Items] |
|
|
|
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| Interest expense related party |
63,955us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_OrbimedPrivateInvestmentsIiiLpMember
|
58,351us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_OrbimedPrivateInvestmentsIiiLpMember
|
|
|
| Global Life Science Ventures Fund |
|
|
|
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| Short-term Debt [Line Items] |
|
|
|
|
| Interest expense related party |
57,709us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_GlobalLifeScienceVenturesFundMember
|
51,778us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_GlobalLifeScienceVenturesFundMember
|
|
|
| Gilde Europe Food & Agribusiness Fund B.V |
|
|
|
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| Short-term Debt [Line Items] |
|
|
|
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| Interest expense related party |
54,158us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_GildeEuropeFoodAgribusinessFundMember
|
49,921us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_GildeEuropeFoodAgribusinessFundMember
|
|
|
| Forbion B.V |
|
|
|
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| Short-term Debt [Line Items] |
|
|
|
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| Interest expense related party |
28,288us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_ForbionMember
|
25,994us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_ForbionMember
|
|
|
| Bridge Loan |
|
|
|
|
| Short-term Debt [Line Items] |
|
|
|
|
| Interest expense related party |
|
|
250,555us-gaap_InterestExpenseRelatedParty
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
|
11,937us-gaap_InterestExpenseRelatedParty
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
|
| Bridge Loan | Orbimed Private Investments III, LP |
|
|
|
|
| Short-term Debt [Line Items] |
|
|
|
|
| Interest expense related party |
|
|
78,411us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_OrbimedPrivateInvestmentsIiiLpMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
|
4,430us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_OrbimedPrivateInvestmentsIiiLpMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
|
| Bridge Loan | Global Life Science Ventures Fund |
|
|
|
|
| Short-term Debt [Line Items] |
|
|
|
|
| Interest expense related party |
|
|
70,131us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_GlobalLifeScienceVenturesFundMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
|
1,297us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_GlobalLifeScienceVenturesFundMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
|
| Bridge Loan | Gilde Europe Food & Agribusiness Fund B.V |
|
|
|
|
| Short-term Debt [Line Items] |
|
|
|
|
| Interest expense related party |
|
|
67,083us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_GildeEuropeFoodAgribusinessFundMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
|
4,331us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_GildeEuropeFoodAgribusinessFundMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
|
| Bridge Loan | Forbion B.V |
|
|
|
|
| Short-term Debt [Line Items] |
|
|
|
|
| Interest expense related party |
|
|
$ 34,930us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_ForbionMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
|
$ 1,879us-gaap_InterestExpenseRelatedParty
/ us-gaap_RelatedPartyTransactionAxis
= pirs_ForbionMember
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
|