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Licensing revenue is consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Services revenue may be derived by providing other, nonspecified, services during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d),(e)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 false2Collaboration and license revenue3false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse5false USDtruefalse$C_0001269021_us-gaapMajorCustomersAxis_ptlaNovartisMember_20120401_20120630http://www.sec.gov/CIK0001269021duration2012-04-01T00:00:002012-06-30T00:00:00falsefalseNovartis AG ("Novartis")us-gaap_MajorCustomersAxisxbrldihttp://xbrl.org/2006/xbrldiptla_NovartisMemberus-gaap_MajorCustomersAxisexplicitMemberU_iso4217USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Novartis AG ("Novartis")4true 3us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]5false 4us-gaap_LicenseAndServicesRevenueus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse6686500066865USD$falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse6934600069346USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRevenue from multiple-deliverable arrangements that include licensing fees and services revenue. Licensing revenue is consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Services revenue may be derived by providing other, nonspecified, services during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d),(e)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 false2Collaboration and license revenue6false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse7false USDtruefalse$C_0001269021_ptlaLicenseAgreementsTypeAxis_us-gaapLicensingAgreementsMember_us-gaapMajorCustomersAxis_ptlaNovartisMember_20120401_20120630http://www.sec.gov/CIK0001269021duration2012-04-01T00:00:002012-06-30T00:00:00falsefalseLicensing Agreementsptla_LicenseAgreementsTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LicensingAgreementsMemberptla_LicenseAgreementsTypeAxisexplicitMemberfalsefalseNovartis AG ("Novartis")us-gaap_MajorCustomersAxisxbrldihttp://xbrl.org/2006/xbrldiptla_NovartisMemberus-gaap_MajorCustomersAxisexplicitMemberU_iso4217USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Licensing Agreements | Novartis AG ("Novartis")7true 3us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]8false 4us-gaap_LicenseAndServicesRevenueus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse5135900051359USD$falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse5328200053282USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRevenue from multiple-deliverable arrangements that include licensing fees and services revenue. Licensing revenue is consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Services revenue may be derived by providing other, nonspecified, services during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d),(e)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 false2Collaboration and license revenue9false 4us-gaap_ReimbursementRevenueus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2truefalsefalse1550600015506USD$falsefalsefalse3falsefalsefalse00falsefalsefalse4truefalsefalse1606400016064USD$falsefalsefalsexbrli:monetaryItemTypemonetaryRepayment received or receivable for expenses incurred on behalf of a client or customer, other than those reimbursements received by landlords from tenants.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 605 -SubTopic 45 -Section 45 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=21915142&loc=d3e60722-111653 false2Reimbursement of research and development expense10false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse9false USDtruefalse$C_0001269021_ptlaLicenseAgreementsTypeAxis_us-gaapLicensingAgreementsMember_us-gaapMajorCustomersAxis_ptlaBristolMyersSquibbCompanyAndPfizerIncMember_20130401_20130630http://www.sec.gov/CIK0001269021duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseLicensing Agreementsptla_LicenseAgreementsTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LicensingAgreementsMemberptla_LicenseAgreementsTypeAxisexplicitMemberfalsefalseBristol-Myers Squibb Company ("BMS") and Pfizer Inc. 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("Pfizer")11true 3us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]12false 4us-gaap_LicenseAndServicesRevenueus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse11060001106USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse30940003094USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRevenue from multiple-deliverable arrangements that include licensing fees and services revenue. Licensing revenue is consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Services revenue may be derived by providing other, nonspecified, services during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d),(e)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 false2Collaboration and license revenue13false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse11false USDtruefalse$C_0001269021_ptlaLicenseAgreementsTypeAxis_us-gaapLicensingAgreementsMember_us-gaapMajorCustomersAxis_ptlaBayerPharmaAgAndJanssenPharmaceuticalsIncrMember_20130401_20130630http://www.sec.gov/CIK0001269021duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseLicensing Agreementsptla_LicenseAgreementsTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LicensingAgreementsMemberptla_LicenseAgreementsTypeAxisexplicitMemberfalsefalseBayer Pharma, AG ('Bayer") and Janssen Pharmaceuticals, Inc. 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("Janssen")14true 3us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]15false 4us-gaap_LicenseAndServicesRevenueus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse13180001318USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse24380002438USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRevenue from multiple-deliverable arrangements that include licensing fees and services revenue. Licensing revenue is consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. Services revenue may be derived by providing other, nonspecified, services during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d),(e)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 false2Collaboration and license revenue16false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse13false USDtruefalse$C_0001269021_ptlaLicenseAgreementsTypeAxis_us-gaapLicensingAgreementsMember_us-gaapMajorCustomersAxis_ptlaLeePharmaceuticalHkLtdMember_20130401_20130630http://www.sec.gov/CIK0001269021duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseLicensing Agreementsptla_LicenseAgreementsTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LicensingAgreementsMemberptla_LicenseAgreementsTypeAxisexplicitMemberfalsefalseLee's Pharmaceutical (HK) Ltd ("Lee's")us-gaap_MajorCustomersAxisxbrldihttp://xbrl.org/2006/xbrldiptla_LeePharmaceuticalHkLtdMemberus-gaap_MajorCustomersAxisexplicitMemberU_iso4217USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Licensing Agreements | Lee's Pharmaceutical (HK) Ltd ("Lee's")17true 3us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItemsus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]18false 4us-gaap_LicenseAndServicesRevenueus-gaap_truecreditdurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse5200052USD$falsefalsefalse2falsefalsefalse00falsefalsefalse3truefalsefalse5200052USD$falsefalsefalse4falsefalsefalse00falsefalsefalsexbrli:monetaryItemTypemonetaryRevenue from multiple-deliverable arrangements that include licensing fees and services revenue. 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Services revenue may be derived by providing other, nonspecified, services during the reporting period.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d),(e)) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 false2Collaboration and license revenue19false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalse3falsefalsefalse00falsefalsefalse4falsefalsefalse00falsefalsefalse15false USDtruefalse$C_0001269021_ptlaLicenseAgreementsTypeAxis_us-gaapLicensingAgreementsMember_us-gaapMajorCustomersAxis_ptlaDaiichiSankyoIncMember_20130401_20130630http://www.sec.gov/CIK0001269021duration2013-04-01T00:00:002013-06-30T00:00:00falsefalseLicensing Agreementsptla_LicenseAgreementsTypeAxisxbrldihttp://xbrl.org/2006/xbrldius-gaap_LicensingAgreementsMemberptla_LicenseAgreementsTypeAxisexplicitMemberfalsefalseDaiichi Sankyo, Inc. 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Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity. 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