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Balance Sheet Accounts (Tables) | 3 Months Ended
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Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Summary of Property and Equipment | The following table summarizes the Company’s major classes of property, plant and equipment:
| December 31, 2023 |  | September 30, 2023
| (in thousands)
Land | $ | 2,996 |  |  | $ | 2,996 |
Building | 71,797 |  |  | — |
Research equipment | 59,956 |  |  | 56,509 |
Furniture | 2,761 |  |  | 1,540 |
Computers and software | 883 |  |  | 700 |
Leasehold improvements | 103,893 |  |  | 103,813 |
Construction in progress | 136,914 |  |  | 166,655 |
| 379,200 |  |  | 332,213 |
Less: Accumulated depreciation and amortization | (45,789) |  |  | (41,951) |
Property, plant and equipment, net | $ | 333,411 |  |  | $ | 290,262 |
Schedule of Accrued Expenses | Accrued expenses consist of the following:
| December 31, 2023 |  | September 30, 2023
| (in thousands)
Accrued R&D expenses | $ | 18,106 |  |  | $ | 16,125 |
Accrued R&D expenses; co-development | 11,104 |  |  | 5,895 |
Accrued capital expenditure | 11,290 |  |  | 14,044 |
Other | 6,104 |  |  | 3,699 |
Total accrued expense | $ | 46,604 |  |  | $ | 39,763 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 10 -Topic 360 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482099/360-10-50-1 + Details
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