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Leases | 6 Months Ended
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Mar. 31, 2025
Leases [Abstract] |
Leases | LEASES Pasadena, California: The Company leases 49,000 square feet of office space located at 177 East Colorado Blvd. for its corporate headquarters from 177 Colorado Owner, LLC, which lease expires on April 30, 2027. The lease contains an option to renew for one additional five-year term. The Company is not reasonably certain that it will exercise this option to renew and therefore it is not included in right-of-use assets and liabilities as of March 31, 2025. San Diego, California: The Company leases 144,000 square feet of office and research and development laboratory space located at 10102 Hoyt Park from 11404 & 11408 Sorrento Valley Owner, LLC, which lease expires on April 30, 2038. Pursuant to the lease, within twelve months of the expiration of the initial 15-year term, the Company has the option to extend the lease for up to one additional ten-year term, with certain annual increases in base rent. The Company is not reasonably certain that it will exercise this option to renew and therefore it is not included in right-of-use assets and liabilities as of March 31, 2025. The lease agreement, as amended, granted the Company the right to receive an Additional Tenant Improvement Allowance (“ATIA”) funded by the lessor. The Company received $30.8 million in ATIA, including a final payment of $3.1 million during the first quarter of fiscal 2024. As a result, the Company remeasured its lease liability and right-of-use assets to reflect these additional allowances and the related increased lease payments. The Company has further concluded that these ATIAs have no effects on the classification of the lease. Madison, Wisconsin: The Company leases 107,000 square feet space located at 502 South Rosa Road for its office and laboratory facilities, which lease expires on September 30, 2031. The lease contains options to renew for two terms of five years. The Company is not reasonably certain that it will exercise this option and therefore it is not included in right-of-use assets and liabilities as of March 31, 2025. The components of lease assets and liabilities along with their classification on the Company’s consolidated balance sheets were as follows:
Lease Assets and Liabilities | Classification |  | March 31, 2025 |  | September 30, 2024
|  |  | (in thousands)
Operating lease assets | Right-of-use assets |  | $ | 44,452 |  |  | $ | 45,255 |
Current operating lease liabilities | Lease liabilities |  | 6,782 |  |  | 6,342 |
Non-current operating lease liabilities | Lease liabilities, net of current portion |  | 107,529 |  |  | 111,027 |
|  |  | Three Months Ended March 31, |  | Six Months Ended March 31,
Lease Cost | Classification |  | 2025 |  | 2024 |  | 2025 |  | 2024
|  | (in thousands)
Operating lease cost | Research and development |  | $ | 2,709 |  |  | $ | 2,572 |  |  | $ | 5,520 |  |  | $ | 5,566 |
| General and administrative expense |  | 500 |  |  | 491 |  |  | 993 |  |  | 967 |
Variable lease cost (1) | Research and development |  | 951 |  |  | 836 |  |  | 1,937 |  |  | 1,615 |
| General and administrative expense |  | — |  |  | — |  |  | — |  |  | — |
Total |  |  | $ | 4,160 |  |  | $ | 3,899 |  |  | $ | 8,450 |  |  | $ | 8,148 |
(1) Variable lease cost is primarily related to operating expenses associated with the Company’s operating leases. There was no short-term lease cost during the three and six months ended March 31, 2025 and 2024, respectively. The following table presents maturities of operating lease liabilities on an undiscounted basis as of March 31, 2025:
Year | Amounts
| (in thousands)
2025 (remainder) | $ | 7,776 |
2026 | 15,799 |
2027 | 14,974 |
2028 | 13,619 |
2029 | 13,905 |
2030 and thereafter | 114,790 |
Total | $ | 180,863 |
Less imputed interest | $ | (66,552) |
Total operating lease liabilities (includes current portion) | $ | 114,311 |
Supplemental cash flow and other information related to leases was as follows:
| Three Months Ended March 31, |  | Six Months Ended March 31,
| 2025 |  | 2024 |  | 2025 |  | 2024
| (in thousands)
Cash received for amounts included in the measurement of lease liabilities: |  |  |  |  |  |  |
Operating cash flows from operating leases | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 3,099 |
Right-of-use assets obtained in exchange for amended operating lease liabilities | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 64 |
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |  |  |
Operating cash flows from operating leases | $ | 3,840 |  |  | $ | 2,046 |  |  | $ | 7,680 |  |  | $ | 4,016 |
|  |  |  |  | March 31,
|  |  |  |  | 2025 |  | 2024
Weighted-average remaining lease term (in years) |  |  |  |  | 12.1 |  | 13.0
Weighted-average discount rate |  |  |  |  | 8.0 | % |  | 8.0 | %

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- Definition The entire disclosure for operating leases of lessee. Includes, but is not limited to, description of operating lease and maturity analysis of operating lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/842-20/tableOfContent + Details
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