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Stock-Based Compensation - Additional Information (Detail) (USD $)
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12 Months Ended | |
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Dec. 31, 2014
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Dec. 31, 2013
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| Stock Based Compensation [Line Items] | ||
| Shares issued under options plan | 2,519,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross | |
| General and administrative expense recognized | $ 571,382us-gaap_AllocatedShareBasedCompensationExpense | |
| Share-based payment award, award vesting period | 3 years | |
| Maximum term of stock options | 10 years | |
| Weighted average grant date fair value | $ 3,248,413us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | |
| Options exercised | 0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised | 0us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised |
| Total fair value of shares vested | 543,926us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedInPeriodFairValue1 | |
| Options vested | 423,750us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber | 0us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestOutstandingNumber |
| Unrecognized share-based compensation expense | 2,588,411us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions | |
| Recognized weighted average service period | 3 years | |
| General and Administrative [Member] | ||
| Stock Based Compensation [Line Items] | ||
| General and administrative expense recognized |
563,759us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember |
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| 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 |
680,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant / us-gaap_PlanNameAxis = pirs_PierisPlanMember |
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| Pieris Plan [Member] | Executive Officers And Directors [Member] | ||
| Stock Based Compensation [Line Items] | ||
| Shares issued under options plan |
1,430,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = pirs_PierisPlanMember / us-gaap_TitleOfIndividualAxis = pirs_ExecutiveOfficersAndDirectorsMember |
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| Pieris Plan [Member] | Employees and Consultants [Member] | ||
| Stock Based Compensation [Line Items] | ||
| Shares issued under options plan |
1,089,500us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross / us-gaap_PlanNameAxis = pirs_PierisPlanMember / us-gaap_TitleOfIndividualAxis = pirs_EmployeesAndConsultantsMember |
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| Pieris Plan [Member] | Consultant [Member] | General and Administrative [Member] | ||
| Stock Based Compensation [Line Items] | ||
| General and administrative expense recognized |
$ 131,984us-gaap_AllocatedShareBasedCompensationExpense / us-gaap_IncomeStatementLocationAxis = us-gaap_GeneralAndAdministrativeExpenseMember / us-gaap_PlanNameAxis = pirs_PierisPlanMember / us-gaap_TitleOfIndividualAxis = pirs_ConsultantMember |
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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
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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
As of the balance sheet date, the number of shares into which fully vested and expected to vest stock options outstanding can be converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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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