Leases - Narrative (Details) $ in Millions	1 Months Ended									3 Months Ended
	Jan. 31, 2026 USD ($) ft²	Dec. 31, 2025 USD ($) ft²	Aug. 31, 2025 USD ($) ft²	Mar. 31, 2025 USD ($) ft²	Jan. 31, 2025 USD ($) ft²	Sep. 30, 2023 USD ($) ft²	Dec. 31, 2021 lease	Nov. 30, 2020 USD ($) ft²	Oct. 31, 2016 ft² lease	Mar. 31, 2026 USD ($)	Mar. 31, 2025 USD ($) ft²	Jul. 31, 2024	Jan. 31, 2023	Sep. 30, 2022 ft²	Feb. 28, 2022 ft²	Jan. 31, 2021	Sep. 30, 2015 ft²
Lessee, Lease, Description [Line Items]
Noncash operating activities related to right-of-use assets										$ 29.2	$ 10.9
Weighted average remaining lease term										7 years 2 months 23 days
Weighted average discount rate (as a percent)										6.50%
Lease expense										$ 5.9	4.4
Operating lease payments										$ 5.9	$ 4.5
Laboratory and Office Spaces
Lessee, Lease, Description [Line Items]
Lease space (area) | ft²		15,485	45,800	57,100		16,319		11,395	136,000		57,100			65,222	32,500		94,000
Number of office space locations | lease							2		2
Annual lease payment			$ 0.7	$ 0.9	$ 9.7	$ 0.9		$ 0.9
Term of lease						60 months		36 months									132 months
Renewal term of lease												60 months	3 years			48 months
Laboratory and Office Spaces | First Space San Carlos, California
Lessee, Lease, Description [Line Items]
Lease space (area) | ft²									88,000
Laboratory and Office Spaces | Second Space San Carlos, California
Lessee, Lease, Description [Line Items]
Lease space (area) | ft²									48,000
Laboratory and Office Spaces | Additional Space San Carlos, California
Lessee, Lease, Description [Line Items]
Lease space (area) | ft²	63,000				40,700
Annual lease payment	$ 4.4				$ 1.5
Term of lease	10 years
Laboratory and Office Spaces | Minimum
Lessee, Lease, Description [Line Items]
Term of lease										1 year
Laboratory and Office Spaces | Maximum
Lessee, Lease, Description [Line Items]
Term of lease										5 years
Austin, TX Additional Premises Lease
Lessee, Lease, Description [Line Items]
Lease space (area) | ft²		28,468
Annual lease payment		$ 0.4
Boulder, CO Lease
Lessee, Lease, Description [Line Items]
Lease space (area) | ft²		25,718
Annual lease payment		$ 1.5