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Stock-Based Compensation (Tables)
6 Months Ended
Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Summary of Awards Outstanding
The following table presents a summary of awards outstanding:
As of March 31, 2024
2004 Plan2013 Plan2021 PlanInducement AwardsTotal
Granted and outstanding awards:
Options— 1,358,377 32,151 688,165 2,078,693 
Restricted stock units— 1,609,510 2,844,090 637,563 5,091,163 
Total— 2,967,887 2,876,241 1,325,728 7,169,856 
Share-Based Payment Arrangement, Expensed
The following table summarizes stock-based compensation expenses included in operating expenses:
Three Months Ended March 31,Six Months Ended March 31,
2024202320242023
Research and development$7,097 $8,745 $15,413 $17,147 
General and administrative9,491 11,868 18,860 22,855 
Total$16,588 $20,613 $34,273 $40,002 
Summarized Information about Stock Options
The following table presents a summary of the stock option activity for the six months ended March 31, 2024:
SharesWeighted-
Average
Exercise
Price
Per Share
Weighted-
Average
Remaining
Contractual
Term (Years)
Aggregate
Intrinsic
Value
Outstanding at September 30, 2023
2,263,477$22.68 
Granted— 
Cancelled or expired(30,437)61.11 
Exercised(154,347)11.53 
Outstanding at March 31, 2024
2,078,693$23.04 4.0 years$26,788,979 
Exercisable at March 31, 2024
2,054,866$22.72 3.9 years$26,788,746 
Summary of Share Activity Related to RSUs
The following table summarizes the activity of the Company’s RSUs:
Number of
RSUs
Weighted-
Average
Grant
Date
Fair Value
Per Share
Outstanding at September 30, 2023
4,241,640$58.43 
Granted1,838,02530.75 
Vested(876,352)53.60 
Forfeited(112,150)44.16 
Outstanding at March 31, 2024
5,091,163$49.58