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Leases | 3 Months Ended
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Dec. 31, 2023
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. San Diego, California: The Company leases 144,000 square feet of office and research and development laboratory space located at 10102 Hoyt Park, San Diego, California, 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 lease agreement grants the Company the right to receive an Additional Tenant Improvement Allowance (“ATIA”) funded by the lessor, with a maximum amount of $7.2 million, subject to a 7% interest per annum over the base term. Further, on September 25, 2023, the Company executed the first amendment to the lease, which grants a second ATIA with a maximum amount of $23.6 million, bearing interest at a rate of 9% per annum over the base term. The Company has received $30.8 million ATIA from the lessor as of December 31, 2023. 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. The Company previously subleased additional research and development space in San Diego, California, which subleases ended during the fiscal year of 2023. Madison, Wisconsin: The Company leases space for office and laboratory facilities, which expires on September 30, 2031. The lease contains options to renew for two terms of five years. After accounting for additional rental square feet added pursuant to amendments to the lease agreement in 2019 and 2020, the Company currently leases a total of 115,000 square feet. 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 |  | December 31, 2023 |  | September 30, 2023
|  |  | (in thousands)
Operating lease assets | Right-of-use assets |  | $ | 44,907 |  |  | $ | 45,297 |
Current operating lease liabilities | Lease liabilities |  | 3,421 |  |  | 10,563 |
Non-current operating lease liabilities | Lease liabilities, net of current portion |  | 115,157 |  |  | 104,608 |
|  |  | Three Months Ended December 31,
Lease Cost | Classification |  | 2023 |  | 2022
Operating lease cost | Research and development |  | $ | 2,994 |  |  | $ | 2,069 |
| General and administrative expense |  | 476 |  |  | 533 |
Variable lease cost (1) | Research and development |  | 779 |  |  | 210 |
| General and administrative expense |  | — |  |  | — |
Total |  |  | $ | 4,249 |  |  | $ | 2,812 |
(1) Variable lease cost is primarily related to operating expenses associated with the Company’s operating leases. There was $0 and $0.1 million short-term lease cost during the three months ended December 31, 2023, and 2022, respectively. The following table presents maturities of operating lease liabilities on an undiscounted basis as of December 31, 2023:
Year | Amounts
| (in thousands)
2024 (remainder of fiscal year) | $ | 9,044 |
2025 | 15,356 |
2026 | 15,696 |
2027 | 14,869 |
2028 | 13,511 |
2029 and thereafter | 128,356 |
Total | $ | 196,832 |
Less imputed interest | $ | (78,254) |
Total operating lease liabilities (includes current portion) | $ | 118,578 |
Supplemental cash flow and other information related to leases was as follows:
|  | Three Months Ended December 31,
|  | 2023 |  | 2022
|  | (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 |  | $ | 2,080 |  |  | $ | 1,331 |
|  | December 31,
|  | 2023 |  | 2022
Weighted-average remaining lease term (in years) |  | 13.3 |  | 6.9
Weighted-average discount rate |  | 8.0 | % |  | 8.5 | %

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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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