Leases - Narrative (Details) ft² in Thousands, $ in Millions	3 Months Ended		15 Months Ended
	Dec. 31, 2024 USD ($) ft² option	Dec. 31, 2023 USD ($)	Dec. 31, 2024 USD ($) ft² option
Lessee Lease Description [Line Items]
Short-term lease cost | $	$ 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