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Fair value measurement - BMS warrants - Narrative (Details) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 USD ($) item | Dec. 31, 2020 USD ($)
Collaboration arrangements |  |
Number of warrant types | item | 2 |
Number of Collaboration Targets | item | 4 |
Collaboration Agreement, Cash Payable | $ | $ 70.0 | $ 70.0
Non-current liabilities |  |
Collaboration arrangements |  |
Fair value of the derivative financial liability | $ | $ 2.6 | $ 2.6
Collaboration Agreement, If 70 Million Is Greater Than Five Percent Of Net Proceeds | Derecognition Of Warrants |  |
Collaboration arrangements |  |
Threshold Percentage Of Net Proceeds | 5.0 |
Percentage Of Net Proceeds Payable | 5 |
Collaboration Agreement, If 70 Million Is Lesser Than One Percent Of Net Proceeds | Derecognition Of Warrants |  |
Collaboration arrangements |  |
Threshold Percentage Of Net Proceeds |  | 1
Percentage Of Net Proceeds Payable |  | 1

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- Definition The amount of non-refundable, non-creditable cash payment to be made under the collaboration agreement. + References No definition available. + Details
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- Definition Number of warrant types are issued. + References No definition available. + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5624163-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 + Details
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