Leases and subleases - Narrative (Details) $ in Thousands			12 Months Ended
Leases and subleases - Narrative (Details) $ in Thousands	Jan. 23, 2023 USD ($) ft²	Apr. 26, 2019 ft² period	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	May 31, 2025 USD ($)	Feb. 29, 2024 USD ($)	Jun. 26, 2019 ft²
Leases - Rental [Line Items]
Depreciation			$ 1,764	$ 1,764	$ 1,979
Sublease, write off					1,266
Rental income			$ 1,238	$ 1,053	$ 781
Gelesis
Leases - Rental [Line Items]
Lease liability, subleased area (in square feet) \| ft²								9,446
Allonia LLC
Leases - Rental [Line Items]
Lease liability, subleased area (in square feet) \| ft²	11,000
Lease liability, initial term	2 years
Sublease annual fees	$ 1,111					$ 1,384	$ 1,279
Lease At 6 Tide Street
Leases - Rental [Line Items]
Rentable area (in square feet) \| ft²		50,858
Lease liability, number of renewal options \| period		2
Lease liability, renewal term		5 years
Lease At 6 Tide Street \| Top of range
Leases - Rental [Line Items]
Lease liability, lease term		10 years
Lease At 6 Tide Street \| Bottom of range
Leases - Rental [Line Items]
Lease liability, lease term		3 months