Restructuring Charges - Charges Related to the Restructuring Activities (Details) - USD ($) $ in Thousands		3 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Restructuring Cost and Reserve [Line Items]
Severance Related Expenses					$ 6,400
Loss on disposal of long-lived assets				$ 0	$ 915	$ 0
Lease Asset Impairment	$ 900
Research and development expense
Restructuring Cost and Reserve [Line Items]
Loss on disposal of long-lived assets		$ 700	$ 700
General and administrative
Restructuring Cost and Reserve [Line Items]
Loss on disposal of long-lived assets		$ 200	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