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Consolidated Statements of Changes in Stockholders' Equity (USD $)
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Total
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Private Placement [Member]
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Common Stock [Member]
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Common Stock [Member]
Private Placement [Member]
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Additional Paid-in Capital [Member]
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Additional Paid-in Capital [Member]
Private Placement [Member]
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Receivable From Issuance of Shares [Member]
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Accumulated Other Comprehensive Loss [Member]
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Accumulated Deficit [Member]
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|---|---|---|---|---|---|---|---|---|---|
| Beginning Balance at Dec. 31, 2012 | $ 495,702us-gaap_StockholdersEquity |
$ 11,829us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
$ 57,608,337us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
$ (121,801)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_ReceivablesFromStockholderMember |
$ (979,383)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
$ (56,023,280)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
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| Beginning Balance shares at Dec. 31, 2012 |
11,828,974us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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| Net income (loss) | 66,196us-gaap_NetIncomeLoss |
66,196us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
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| Foreign currency translation adjustment | 23,109us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax |
23,109us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
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| Ending Balance at Dec. 31, 2013 | 585,007us-gaap_StockholdersEquity |
11,829us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
57,608,337us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
(121,801)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_ReceivablesFromStockholderMember |
(956,274)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
(55,957,084)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
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| Beginning Balance shares at Dec. 31, 2013 |
11,828,974us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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| Net income (loss) | (9,849,964)us-gaap_NetIncomeLoss |
(9,849,964)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
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| Foreign currency translation adjustment | 113,176us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax |
113,176us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
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| Beneficial conversion feature | 2,236,581us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature |
2,236,581us-gaap_DebtInstrumentConvertibleBeneficialConversionFeature / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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| Series C Shares Conversion | 4,380,906us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities |
5,009us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
4,254,096us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
121,801us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_ReceivablesFromStockholderMember |
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| Series C Shares Conversion, shares |
5,008,870us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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| Issuance of Series C Cash Shares net $76,367 in offering costs | 7,342,077pirs_PreferredStockIssuedDuringPeriodValueNewIssues |
5,662pirs_PreferredStockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
7,336,414pirs_PreferredStockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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| Issuance of Series C Cash Shares net $76,367 in offering costs, shares |
5,662,167pirs_PreferredStockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
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| Issuance of Common Stock net $1,595,832 in offering costs |
11,963,188us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |
6,780us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |
11,956,408us-gaap_StockIssuedDuringPeriodValueNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |
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| Issuance of Common stock, shares |
6,779,510us-gaap_StockIssuedDuringPeriodSharesNewIssues / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember / us-gaap_SubsidiarySaleOfStockAxis = us-gaap_PrivatePlacementMember |
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| Stock-based compensation expense | 571,382us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue |
571,382us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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| Issuance of Warrants | 664,064pirs_IssuanceOfWarrants |
664,064pirs_IssuanceOfWarrants / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
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| Ending Balance at Dec. 31, 2014 | $ 18,006,417us-gaap_StockholdersEquity |
$ 29,280us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
$ 84,627,283us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |
$ (843,097)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AccumulatedOtherComprehensiveIncomeMember |
$ (65,807,048)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |
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| Ending Balance shares at Dec. 31, 2014 |
29,279,522us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |
| X | ||||||||||
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- Definition
Issuance of warrants. No definition available.
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| X | ||||||||||
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- Definition
Preferred Stock Issued During Period Shares New Issues No definition available.
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| X | ||||||||||
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- Definition
Preferred Stock Issued During Period Value New Issues No definition available.
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| X | ||||||||||
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- Definition
This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation". Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount of a favorable spread to a debt holder between the amount of debt being converted and the value of the securities received upon conversion. This is an embedded conversion feature of convertible debt issued that is in-the-money at the commitment date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of shares issued which are neither cancelled nor held in the treasury. No definition available.
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| X | ||||||||||
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- Definition
Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of shares issued during the period as a result of the conversion of convertible securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of new stock issued during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The gross value of stock issued during the period upon the conversion of convertible securities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Equity impact of the value of new stock issued during the period. Includes shares issued in an initial public offering or a secondary public offering. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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