Balance sheet components-Property and equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization [Abstract]
Property, plant and equipment, gross	$ 14,862	$ 5,981
Less accumulated depreciation and amortization	(4,749)	(3,908)
Property and equipment, net	10,113	2,073
Lab equipment
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization [Abstract]
Property, plant and equipment, gross	9,501	5,386
Construction in progress
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization [Abstract]
Property, plant and equipment	3,297
Leasehold improvements
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization [Abstract]
Property, plant and equipment	1,636	233
Computer equipment
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization [Abstract]
Property, plant and equipment	270	326
Office equipment and furniture and fixtures
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization [Abstract]
Property, plant and equipment	$ 158	$ 36