XML 64 R39.htm IDEA: XBRL DOCUMENT
v3.25.3

Liability Related to the Sale of Future Royalties (Tables) | 12 Months Ended
--- | ---
Sep. 30, 2025
Liability Related To The Sale Of Future Royalties [Abstract] |
Schedule of Liability Related to the Sale of Future Royalties | The following table presents the activity with respect to the liability related to the sale of future royalties.
|  | September 30,
|  | 2025 |  | 2024
|  | (in thousands)
Beginning carrying value |  | $ | 341,361 |  |  | $ | 268,326 |
Upfront payment received |  | — |  |  | — |
Milestone payment received |  | — |  |  | 50,000 |
Non-cash interest expense recognized |  | 26,036 |  |  | 23,035 |
Ending carrying value |  | $ | 367,397 |  |  | $ | 341,361 |

X
- Definition Liability Related To The Sale Of Future Royalties + References No definition available. + Details
Name: | arwr_LiabilityRelatedToTheSaleOfFutureRoyaltiesAbstract
Namespace Prefix: | arwr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Schedule Of Liability Related To The Sale Of Future Royalties + References No definition available. + Details
Name: | arwr_ScheduleOfLiabilityRelatedToTheSaleOfFutureRoyaltiesTableTextBlock
Namespace Prefix: | arwr_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration