XML 59 R45.htm IDEA: XBRL DOCUMENT v2.4.0.8

Leases - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended		125 Months Ended
	Aug. 31, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013
Component Of Operating Other Cost And Expense [Line Items]
Rental expense	$ 13,000			$ 4,660,000
Capital Lease Term of Lease	5 years
Percentage of increase in annual rental cost	3.00%
Rental expenses include common area maintenance and real estate taxes		13,000
Utilities costs per month		15,000
Increase in total monthly expenditures		71,000
Facility and equipment rent expense		534,000	480,000
Roche
Component Of Operating Other Cost And Expense [Line Items]
Rental expense		22,000
Monthly payments under capital lease		$ 21,000

X

- Definition

Capital Lease Term Of Lease.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

X

- Definition

Facility and equipment rent expense.

+ References

No definition available.

+ Details

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Namespace Prefix:	arwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Increase in monthly expenditure due to utilities costs.

+ References

No definition available.

+ Details

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X

- Definition

Other rental expenses.

+ References

No definition available.

+ Details

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Namespace Prefix:	arwr_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Payments under capital lease.

+ References

No definition available.

+ Details

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Namespace Prefix:	arwr_
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Balance Type:	debit
Period Type:	duration

X

- Definition

Percentage Of Increase In Annual Rental Cost.

+ References

No definition available.

+ Details

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Namespace Prefix:	arwr_
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X

- Details

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X

- Definition

Rental expense incurred for leased assets including furniture and equipment which has not been recognized in costs and expenses applicable to sales and revenues; for example, cost of goods sold or other operating costs and expenses.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	debit
Period Type:	duration

X

- Definition

Utilities costs incurred during the reporting period for services, such as water, sewer, gas, electricity and telephone required to operate a building.

+ References

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 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

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