Description of the business (Details) $ in Thousands			1 Months Ended			3 Months Ended
	Dec. 22, 2023 USD ($)	Dec. 19, 2023 shares	Mar. 31, 2024 USD ($) tranche	Dec. 31, 2023 USD ($) shares	Aug. 31, 2023 USD ($)	Mar. 31, 2024 USD ($) tranche shares	Mar. 31, 2023 USD ($)
Subsidiary, Sale of Stock [Line Items]
Number of tranches | tranche			4			4
Accumulated deficit			$ 4,330,132	$ 4,260,328		$ 4,330,132
Net (loss) income						69,804	$ (18,930)
Net cash used in operating activities						74,676	$ 71,358
Cash, cash equivalents and marketable securities			$ 212,000			212,000
Term Loan
Subsidiary, Sale of Stock [Line Items]
Debt instrument term			5 years
Line of credit			$ 175,000			$ 175,000
At The Market Offering
Subsidiary, Sale of Stock [Line Items]
Proceeds from stock offering					$ 125,000
Shares of common stock sold (in shares) | shares						0
December Underwriting Agreement
Subsidiary, Sale of Stock [Line Items]
Proceeds from stock offering	$ 118,100			$ 118,100
Shares of common stock sold (in shares) | shares		83,300,000		83,300,000