Subsequent events (Details) - Subsequent events - Atlas Data Storage, Inc - Collaborative Arrangement $ in Millions	May 02, 2025 USD ($)
Subsequent Event [Line Items]
Contribution agreement, contingent manufacturing and commercial milestone payments	$ 75.0
Collaborative arrangement, consideration transferred	73.0
Collaborative arrangement cash consideration	2.5
Collaborative arrangement, equity interest issued	155.2
Collaborative arrangement, equity interest issued, conversion of debt	6.2
Promissory Note
Subsequent Event [Line Items]
Debt instrument, face amount	$ 2.0