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Income Taxes - Additional Information (Detail) (USD $)
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12 Months Ended | |
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Dec. 31, 2013
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Dec. 31, 2012
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| Income Taxes [Line Items] | ||
| Increase in valuation allowance | 645,812us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount | |
| Liability for unrecognized tax positions | 0us-gaap_UnrecognizedTaxBenefits | |
| GERMANY | ||
| Income Taxes [Line Items] | ||
| Applicable statutory tax rate |
29.13%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_DE |
29.13%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate / us-gaap_IncomeTaxAuthorityAxis = country_DE |
| GERMANY | Corporate Income Tax | ||
| Income Taxes [Line Items] | ||
| Operating loss carryforward |
58,500,460us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = country_DE / us-gaap_TaxCreditCarryforwardAxis = pirs_CorporateIncomeTaxMember |
52,637,482us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = country_DE / us-gaap_TaxCreditCarryforwardAxis = pirs_CorporateIncomeTaxMember |
| GERMANY | Trade Tax | ||
| Income Taxes [Line Items] | ||
| Operating loss carryforward |
57,153,994us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = country_DE / us-gaap_TaxCreditCarryforwardAxis = pirs_TradeTaxMember |
51,466,509us-gaap_OperatingLossCarryforwards / us-gaap_IncomeTaxAuthorityAxis = country_DE / us-gaap_TaxCreditCarryforwardAxis = pirs_TradeTaxMember |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of increase (decrease) in the valuation allowance for a specified deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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