Leases - Summer Street Lease (Details) ft² in Thousands, $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2019 ft²	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Operating Leases
Weighted-average discount rate of operating leases (as a percent)		5.80%	5.80%	5.80%	5.80%
Operating lease right-of-use assets		$ 11,823		$ 11,823		$ 12,586
Operating lease liability		16,609		16,609
Operating lease cost		$ 627	$ 627	$ 1,254	$ 1,254
Summer Street Lease
Operating Leases
Rentable area leased (in square feet) | ft²	39
Annual rent escalation (as a percent)	2.00%
Option to extend the term of the lease	true
Operating lease, renewal term	5 years
Weighted-average discount rate of operating leases (as a percent)		5.80%		5.80%
Operating lease right-of-use assets		$ 11,800		$ 11,800		12,600
Operating lease liability		16,600		16,600		$ 17,700
Operating lease cost		$ 600		$ 1,300