Common stock - Narratives (Details) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended	11 Months Ended
	Jan. 31, 2025 USD ($) $ / shares shares	Mar. 31, 2025 USD ($) Vote shares	Mar. 31, 2025 USD ($) shares	May 14, 2024 USD ($)
Common stock voting right | Vote		1
Open Market Sale (ATM Agreement)
Shares issued | shares		0	2,030,431
Offering price of shares				$ 200.0
Percentage of commission				3.00%
Gross proceeds from issuance of common shares			$ 20.0
Net proceeds from issuance of common stock			19.6
Value of shares available for future issuance		$ 180.0	$ 180.0
Public offering
Shares issued | shares	22,258,064
Share price | $ / shares	$ 7.75
Net proceeds from issuance of common stock	$ 161.7