Leases - Narrative (Details) $ in Thousands, € in Millions	1 Months Ended											3 Months Ended	12 Months Ended		13 Months Ended	22 Months Ended	24 Months Ended
	Oct. 31, 2022 ft² $ / ft²	Aug. 31, 2022 USD ($)	Jul. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Nov. 30, 2021 USD ($) ft² $ / ft²	Oct. 31, 2021 USD ($) ft²	Feb. 28, 2021 USD ($)	Jul. 31, 2020 USD ($)	Apr. 30, 2019 USD ($) ft² $ / ft²	Jan. 31, 2019 EUR (€)	Jun. 30, 2022 USD ($) ft²	Dec. 31, 2023 USD ($) lease_arrangement	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($) lease_arrangement	Mar. 31, 2018 USD ($)	Dec. 31, 2019 EUR (€)	Sep. 30, 2023 USD ($)	Nov. 30, 2016	Jun. 30, 2016
Lessee, Lease, Description [Line Items]
Lease arrangements annual rent increase percentage										3.00%
Number of embedded lease arrangements | lease_arrangement													6		6
Total purchase commitments													$ 54,494		$ 54,494
Prepaid expenses													14,800	$ 8,618	14,800
Finance lease amortization without alternative future use													21,200	11,200
60 Binney Street lease
Lessee, Lease, Description [Line Items]
Collateralized letter of credit							$ 13,800
Market capitalization required for release of liability							$ 900,000
Lease building space (in sq ft) | ft²							72,988					58,004
Lessee, operating lease, monthly expense			$ 600				$ 1,000					$ 800
50 Binney Street sublease
Lessee, Lease, Description [Line Items]
Collateralized letter of credit				$ 40,100						$ 40,100
Lease building space (in sq ft) | ft²										267,278
Rate of area for sublease per square feet (in dollars per sq ft) | $ / ft²										99.95
Lessee, operating lease, annual expense										$ 26,700
Lease arrangements annual rent increase percentage				3.00%
Annual base rent of sub-sublease				$ 29,400
Monthly sub-lease income														$ 2,600
Assembly Row lease
Lessee, Lease, Description [Line Items]
Lease building space (in sq ft) | ft²						61,180
Annual lease rent per square foot (in dollars per sq ft) | $ / ft²						45
Lease rent, annual increase percentage						2.50%
Tenant work allowance (in dollars per sq ft) | $ / ft²						160
Monthly rent expense						$ 300
Manufacturing Facility
Lessee, Lease, Description [Line Items]
Finance lease term		14 months						5 years	5 years					3 years					5 years	12 years
Milestone paid																$ 12,000
Lessee, financing lease, annual expense													$ 5,100
Termination slot fees, term													24 months
Termination labor fees terms													12 months
Finance lease not yet commenced, term																		3 years
Total purchase commitments																		$ 54,500
Prepaid expenses													$ 3,700		3,700
Finance lease, renewal term																			3 years
Finance lease, annual maintenance and production fee | €											€ 16.5
Payment of termination fee | €					€ 1.0
Lessee, operating lease, maximum potential annual maintenance fees								$ 4,200	$ 5,400
Lessee, operating lease, termination notice period								18 months	18 months
Lessee, operating lease, termination notice period, after stage 5 commencement								8 months
Lease payments and deposit		$ 10,800
Milestone prepayments | €																	€ 13.5
Annual suite fees, year one														$ 13,500
Annual suite fees, year two														18,000
Annual suite fees, year three														$ 18,000
Hood Park Lease
Lessee, Lease, Description [Line Items]
Lease building space (in sq ft) | ft²	42,261
Annual lease rent per square foot (in dollars per sq ft) | $ / ft²	55
Lease rent, annual increase percentage	3.00%
Monthly rent expense															$ 200