XML 61 R45.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Leases - Narrative (Details) $ in Thousands |  | 2 Months Ended | 12 Months Ended | 17 Months Ended |
--- | --- | --- | --- | --- | ---
Nov. 19, 2021 USD ($) ft² option | Dec. 31, 2020 ft² | Sep. 30, 2022 USD ($) option | Sep. 30, 2021 USD ($) | May 31, 2020 ft² | Sep. 30, 2019 ft² option
Lessee Lease Description [Line Items] |  |  |  |  |  |
Estimated lease payments |  |  | $ 151,944 |  |  |
Short-term lease cost |  |  | $ 300 | $ 0 |  |
Research Facility in San Diego | California |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Lease term | 15 years |  |  |  |  |
Office space leases (in sq ft) | ft² | 144,000 |  |  |  |  |
Estimated lease payments | $ 119,000 |  |  |  |  |
Estimated payments for operating expenses year one | 3,000 |  |  |  |  |
Payments for leasehold improvements, net of tenant improvement allowances | $ 31,000 |  |  |  |  |
Operating lease renewal term | 10 years |  |  |  |  |
Research Facility in San Diego | California | Maximum |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Number of options to renew | option | 1 |  |  |  |  |
Corporate Headquarters In Pasadena | California |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Office space leases (in sq ft) | ft² |  |  |  |  |  | 24,000
Corporate Headquarters In Pasadena | California | Colorado Owner, LLC |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Number of options to renew | option |  |  |  |  |  | 1
Operating lease renewal term |  |  |  |  |  | 5 years
Research Facility in Madison | Wisconsin |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Number of options to renew | option |  |  | 2 |  |  |
Operating lease renewal term |  |  | 5 years |  |  |
Additional office space for lease (in sq ft) | ft² |  | 10,743 |  |  | 40,000 |

X
- Definition Additional land subject to lease. + References No definition available. + Details
Name: | arwr_AdditionalLandSubjectToLease
Namespace Prefix: | arwr_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated payments for operating expenses year one. + References No definition available. + Details
Name: | arwr_EstimatedPaymentsForOperatingExpensesYearOne
Namespace Prefix: | arwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Number of options to renew. + References No definition available. + Details
Name: | arwr_NumberOfOptionsToRenew
Namespace Prefix: | arwr_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Payments of leasehold improvements net of tenant improvement allowances. + References No definition available. + Details
Name: | arwr_PaymentsOfLeaseholdImprovementsNetOfTenantImprovementAllowances
Namespace Prefix: | arwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Area of land subject to a ground lease. + References No definition available. + Details
Name: | us-gaap_LandSubjectToGroundLeases
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of lessee's undiscounted obligation for lease payment for operating lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918701-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseRenewalTerm
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918673-209980 + Details
Name: | us-gaap_LesseeOperatingLeaseTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of short-term lease cost, excluding expense for lease with term of one month or less. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=128292326&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI https://asc.fasb.org/extlink&oid=123414884&loc=SL77918982-209971 + Details
Name: | us-gaap_ShortTermLeaseCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=arwr_ResearchFacilityInSanDiegoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_CA
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=arwr_CorporateHeadquartersInPasadenaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_CounterpartyNameAxis=arwr_ColoradoOwnerLLCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=arwr_ResearchFacilityInMadisonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=stpr_WI
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |