Common stock - Narratives (Details) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended		17 Months Ended
	Jan. 31, 2025	Sep. 30, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	May 14, 2024
Net proceeds from issuance of common stock			$ 45,897	$ 0
Open Market Sale (ATM Agreement)
Shares issued		4,625,156	4,625,156		6,655,587
Offering price of shares						$ 200,000
Percentage of commission						3.00%
Gross proceeds from issuance of common shares		$ 45,900	$ 45,900		$ 65,900
Net proceeds from issuance of common stock		44,900	44,900		64,500
Value of shares available for future issuance		$ 134,100	$ 134,100		$ 134,100
Public offering
Shares issued	22,258,064
Share price	$ 7.75
Net proceeds from issuance of common stock	$ 161,700