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Stock-based Compensation - Additional Information (Detail) (USD $)
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3 Months Ended | ||
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Mar. 31, 2015
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Mar. 31, 2014
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Mar. 24, 2015
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| Stock Based Compensation [Line Items] | |||
| Number of shares, Options granted | 25,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross | ||
| Share-based payment award, award vesting period | 3 years | ||
| Maximum term of stock options | 10 years | ||
| Weighted average grant date fair value | $ 46,442us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | ||
| Number of shares, Options exercised | 0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | |
| Options vested | 174,646us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares | ||
| Unrecognized share-based compensation expense | $ 2,414,729us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions | ||
| Recognized weighted average service period | 2 years 9 months | ||
| First Quarter Of Two Thousand Fifteen Member | |||
| Stock Based Compensation [Line Items] | |||
| Recognized weighted average service period | 3 years | ||
| Pieris Plan [Member] | |||
| Stock Based Compensation [Line Items] | |||
| Common stock reserved for issuance |
3,200,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance / us-gaap_PlanNameAxis = pirs_PierisPlanMember |
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| Share-based compensation description | (i) 1,000,000 shares, (ii) 4% of the number of shares of the Company’s common stock outstanding on such date, and (iii) such other amount determined by the administrator. As of December 31, 2014, options to purchase 1,430,000 shares of the Company’s common stock have been issued under the Pieris Plan to their executive officers and directors, and options to purchase 1,089,500 shares have been issued under the Pieris Plan to other employees and consultants. | ||
| Common stock available for grant |
655,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = pirs_PierisPlanMember |
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| Pieris Plan [Member] | Executive Officers And Directors [Member] | Fourth Quarter Of Two Thousand Fourteen Member | |||
| Stock Based Compensation [Line Items] | |||
| Number of shares, Options granted |
1,430,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardDateAxis = pirs_FourthQuarterOfTwoThousandFourteenMember / us-gaap_PlanNameAxis = pirs_PierisPlanMember / us-gaap_TitleOfIndividualAxis = pirs_ExecutiveOfficersAndDirectorsMember |
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| Pieris Plan [Member] | Employees and Consultants [Member] | Fourth Quarter Of Two Thousand Fourteen Member | |||
| Stock Based Compensation [Line Items] | |||
| Number of shares, Options granted |
1,089,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardDateAxis = pirs_FourthQuarterOfTwoThousandFourteenMember / us-gaap_PlanNameAxis = pirs_PierisPlanMember / us-gaap_TitleOfIndividualAxis = pirs_EmployeesAndConsultantsMember |
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| Pieris Plan [Member] | Employees and Consultants [Member] | First Quarter Of Two Thousand Fifteen Member | |||
| Stock Based Compensation [Line Items] | |||
| Number of shares, Options granted |
25,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_AwardDateAxis = pirs_FirstQuarterOfTwoThousandFifteenMember / us-gaap_PlanNameAxis = pirs_PierisPlanMember / us-gaap_TitleOfIndividualAxis = pirs_EmployeesAndConsultantsMember |
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- Definition
Share Based Compensation Arrangement By Share Based Payment Award Increase In Number Of Shares Authorized Description No definition available.
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- Details
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- Definition
Aggregate number of common shares reserved for future issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Unrecognized cost of unvested options awarded to employees as compensation. No definition available.
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- Definition
Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Gross number of share options (or share units) granted during the period. No definition available.
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- Definition
The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Number of options vested. No definition available.
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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- Details
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