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

Summary of Financial Obligations (Detail)

v2.4.1.9
Summary of Financial Obligations (Detail) (USD $)
Dec. 31, 2013
Bridge Loan  
Debt Instrument [Line Items]  
2015 $ 3,089,502us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
Thereafter 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
Total 3,089,502us-gaap_LongTermDebt
/ us-gaap_ShortTermDebtTypeAxis
= us-gaap_BridgeLoanMember
Bank Loan [Member]  
Debt Instrument [Line Items]  
2014 206,490us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
/ us-gaap_ShortTermDebtTypeAxis
= pirs_BankLoanMember
2015 688,300us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
/ us-gaap_ShortTermDebtTypeAxis
= pirs_BankLoanMember
2016 757,130us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
/ us-gaap_ShortTermDebtTypeAxis
= pirs_BankLoanMember
Thereafter 0us-gaap_LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
/ us-gaap_ShortTermDebtTypeAxis
= pirs_BankLoanMember
Total $ 1,651,920us-gaap_LongTermDebt
/ us-gaap_ShortTermDebtTypeAxis
= pirs_BankLoanMember