Balance Sheet Accounts - Narrative (Details) - USD ($) $ in Millions	3 Months Ended				6 Months Ended	9 Months Ended		12 Months Ended
	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023	Jun. 30, 2025	Jun. 30, 2025	Jun. 30, 2024	Sep. 30, 2024
Property, Plant and Equipment [Line Items]
Depreciation and amortization expense for property and equipment	$ 5.8		$ 4.4			$ 16.2	$ 12.3
Construction In Progress Reclassified To Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, reclassification		$ (162.7)			$ (10.6)
Buildings
Property, Plant and Equipment [Line Items]
Property, plant and equipment, reclassification		162.7		$ 71.8	10.6			$ 4.2
Construction In Progress Reclassified To Manufacturing Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, reclassification		(2.6)			(13.9)
Manufacturing equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, reclassification		$ 2.6			$ 13.9
Manufacturing equipment | Minimum
Property, Plant and Equipment [Line Items]
Useful life	7 years				7 years	7 years
Manufacturing equipment | Maximum
Property, Plant and Equipment [Line Items]
Useful life	10 years				10 years	10 years
Manufacturing Facility
Property, Plant and Equipment [Line Items]
Useful life	39 years				39 years	39 years
Construction in progress
Property, Plant and Equipment [Line Items]
Property, plant and equipment, reclassification				$ (71.8)				$ (4.2)