Reduction in workforce - Accrued Liabilities Activity (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Restructuring Expenses		$ 0	$ 4,940
Amounts paid			(4,940)
April 2022 Reduction
Restructuring Cost and Reserve [Line Items]
Restructuring Expenses			4,940
Amounts paid	$ (4,900)		$ (4,940)