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v3.25.1

Leases - Narrative (Details) ft² in Thousands, $ in Millions | 3 Months Ended | 6 Months Ended | 15 Months Ended
--- | --- | --- | ---
Mar. 31, 2025 USD ($) ft² option | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Mar. 31, 2025 USD ($) ft² option | Mar. 31, 2024 USD ($) | Dec. 31, 2024 USD ($)
Lessee Lease Description [Line Items] |  |  |  |  |  |
Short-term lease cost | $ | $ 0.0 | $ 0.0 |  | $ 0.0 | $ 0.0 |
Corporate Headquarters In Pasadena | California |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Office space leases (in sq ft) | ft² | 49 |  |  | 49 |  |
Corporate Headquarters In Pasadena | California | Colorado Owner, LLC |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Number of options to renew | option | 1 |  |  | 1 |  |
Operating lease renewal term | 5 years |  |  | 5 years |  |
Research Facility in San Diego | California |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Office space leases (in sq ft) | ft² | 144 |  |  | 144 |  |
Operating lease renewal term | 10 years |  |  | 10 years |  |
Lease term | 15 years |  |  | 15 years |  |
Proceeds from additional tenant improvement allowance | $ |  |  | $ 3.1 |  |  | $ 30.8
Research Facility in San Diego | California | Maximum |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Number of options to renew | option | 1 |  |  | 1 |  |
Research Facility in Madison | Wisconsin |  |  |  |  |  |
Lessee Lease Description [Line Items] |  |  |  |  |  |
Office space leases (in sq ft) | ft² | 107 |  |  | 107 |  |
Number of options to renew | option | 2 |  |  | 2 |  |
Operating lease renewal term | 5 years |  |  | 5 years |  |

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- Definition Area of land subject to a ground lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-3 + Details
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