XML 26 R1.htm IDEA: XBRL DOCUMENT v3.24.1.u1
Cover - shares
6 Months Ended
Mar. 31, 2024
May 01, 2024
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2024  
Document Transition Report false  
Entity File Number 001-38042  
Entity Registrant Name ARROWHEAD PHARMACEUTICALS, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 46-0408024  
Entity Address, Address Line One 177 E. Colorado Blvd  
Entity Address, Address Line Two Suite 700  
Entity Address, City or Town Pasadena  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 91105  
City Area Code 626  
Local Phone Number 304-3400  
Title of 12(b) Security Common Stock, par value $0.001 per share  
Trading Symbol ARWR  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   124,200,230
Entity Central Index Key 0000879407  
Current Fiscal Year End Date --09-30  
Document Fiscal Year Focus 2024  
Document Fiscal Period Focus Q2  
Amendment Flag false