Restructuring Charges - Charges Related to the Restructuring Activities (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Restructuring Cost and Reserve [Line Items]
Severance Related Expenses			$ 6,400		$ 6,400
Stock-based compensation expense		$ 8,682	1,911	$ 22,517	3,620
Loss on Disposal of Long Lived Assets				0	915
Lease Asset Impairment	$ 900
Research and Development Expense
Restructuring Cost and Reserve [Line Items]
Stock-based compensation expense		3,451	394	10,308	1,171
Loss on Disposal of Long Lived Assets			700
General and administrative
Restructuring Cost and Reserve [Line Items]
Stock-based compensation expense		$ 5,231	1,517	$ 12,209	$ 2,449
Loss on Disposal of Long Lived Assets			200
Restructuring Activities
Restructuring Cost and Reserve [Line Items]
Severance Related Expenses			6,448
Stock-based compensation expense			993
Loss on Disposal of Long Lived Assets			931
Lease Asset Impairment			2,580
Total Restructuring Costs			10,952
Restructuring Activities | Research and Development Expense
Restructuring Cost and Reserve [Line Items]
Severance Related Expenses			3,182
Stock-based compensation expense			123
Loss on Disposal of Long Lived Assets			749
Lease Asset Impairment			1,405
Total Restructuring Costs			5,459
Restructuring Activities | General and administrative
Restructuring Cost and Reserve [Line Items]
Severance Related Expenses			3,266
Stock-based compensation expense			870
Loss on Disposal of Long Lived Assets			182
Lease Asset Impairment			1,175
Total Restructuring Costs			$ 5,493