XML 44 R33.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Commitments and Contingencies - Additional Information (Detail) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) ft² | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) ft² | Jun. 30, 2016 USD ($)
Other Commitments [Line Items] |  |  |  |
Facility rent expense | $ 328,600 | $ 232,000 | $ 1,126,500 | $ 659,000
Provision for recorded liabilities | 0 |  | 0 |
Future commitments | 14,300,000 |  | 14,300,000 |
Commitments expected to be incurred in fiscal 2017 | 5,000,000 |  | 5,000,000 |
Commitments expected to be incurred beyond fiscal 2017 | 9,300,000 |  | 9,300,000 |
Technology License Commitments |  |  |  |
Other Commitments [Line Items] |  |  |  |
Milestone payments | $ 0 | $ 0 | $ 0 | $ 0
Corporate Headquarters In Pasadena |  |  |  |
Other Commitments [Line Items] |  |  |  |
Office space leases, in square feet | ft² | 8,500 |  | 8,500 |
Operating lease expiration month and year |  |  | 2019-09 |
Rental expense |  |  | $ 27,000 |
Percentage of increase in annual rental cost |  |  | 3.00% |
Research Facility in Madison |  |  |  |
Other Commitments [Line Items] |  |  |  |
Office space leases, in square feet | ft² | 60,000 |  | 60,000 |
Operating lease expiration month and year |  |  | 2026-09 |
Primary tenant improvement allowance accounted for as deferred rent | $ 2,100,000 |  | $ 2,100,000 |
Secondary tenant improvement allowance accounted for as note payable | 2,700,000 |  | 2,700,000 |
Rental expense including common area maintenance and real estate taxes and payments of principal and interest on the note payable |  |  | $ 180,200 |
Percentage of increase in annual rental cost excluding principal and interest on the note payable |  |  | 2.50% |
Promissory note payable | $ 2,700,000 |  | $ 2,700,000 |
Promissory notes payable amortized term |  |  | 10 years |
Promissory note commencement date |  |  | Oct. 01, 2016 |
Promissory note interest rate |  |  | 7.10% |
Research Facility in Middleton |  |  |  |
Other Commitments [Line Items] |  |  |  |
Operating lease expiration month and year |  |  | 2016-12 |
Rental expense |  |  | $ 14,000 |
Other rental expenses including common area maintenance and real estate taxes |  |  | $ 4,000 |

X
- Definition Facility rent expense. + References No definition available. + Details
Name: | arwr_FacilityRentExpense
Namespace Prefix: | arwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Lease and rental expense including common area maintenance and real estate taxes and payment of principal and interest. + References No definition available. + Details
Name: | arwr_LeaseAndRentalExpenseIncludingCommonAreaMaintenanceAndRealEstateTaxesAndPaymentOfPrincipalAndInterest
Namespace Prefix: | arwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Lease expiration month and year. + References No definition available. + Details
Name: | arwr_LeaseExpirationMonthAndYear
Namespace Prefix: | arwr_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

X
- Definition Milestone payments. + References No definition available. + Details
Name: | arwr_MilestonePayments
Namespace Prefix: | arwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Notes payable amortized term. + References No definition available. + Details
Name: | arwr_NotesPayableAmortizedTerm
Namespace Prefix: | arwr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Other rental expenses. + References No definition available. + Details
Name: | arwr_OtherRentalExpenses
Namespace Prefix: | arwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of increase in annual rental cost. + References No definition available. + Details
Name: | arwr_PercentageOfIncreaseInAnnualRentalCost
Namespace Prefix: | arwr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of increase in annual rental cost excluding principal and interest on note payable. + References No definition available. + Details
Name: | arwr_PercentageOfIncreaseInAnnualRentalCostExcludingPrincipalAndInterestOnNotePayable
Namespace Prefix: | arwr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Primary tenant improvement allowance. + References No definition available. + Details
Name: | arwr_PrimaryTenantImprovementAllowance
Namespace Prefix: | arwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Promissory note interest rate. + References No definition available. + Details
Name: | arwr_PromissoryNoteInterestRate
Namespace Prefix: | arwr_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Promissory note payable commencement date. + References No definition available. + Details
Name: | arwr_PromissoryNotePayableCommencementDate
Namespace Prefix: | arwr_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Definition Secondary tenant improvement allowance. + References No definition available. + Details
Name: | arwr_SecondaryTenantImprovementAllowance
Namespace Prefix: | arwr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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: | num:areaItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
Name: | us-gaap_LossContingencyAccrualAtCarryingValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
Name: | us-gaap_NotesPayable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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_OtherCommitmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
Name: | us-gaap_PurchaseObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of purchase arrangement maturing in the second fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
Name: | us-gaap_PurchaseObligationDueInSecondYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Minimum amount of purchase arrangement maturing in the remainder of the fiscal year following the latest fiscal year ended. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments. + References No definition available. + Details
Name: | us-gaap_PurchaseObligationFutureMinimumPaymentsRemainderOfFiscalYear
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=arwr_TechnologyLicenseCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | us-gaap_PropertySubjectToOrAvailableForOperatingLeaseAxis=arwr_ResearchFacilityInMiddletonMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |