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Intangible assets - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Dosing Of Specific Number Of Patients | Milestone Payment
Disclosure of detailed information about intangible assets [line items]
Additions	$ 500
Successful Completion Of In-Vivo Efficacy Studies | Milestone Payment
Disclosure of detailed information about intangible assets [line items]
Additions	$ 195
License To Acquire An Antibody, ZYNLONTA | Milestone Payment
Disclosure of detailed information about intangible assets [line items]
Additions		$ 1,050
ZYNLONTA
Disclosure of detailed information about intangible assets [line items]
Useful life measured as period of time, intangible assets other than goodwill		14 years
License To Use Technology To Generate Antibody Drug Conjugates, ZYNLONTA | Milestone Payment
Disclosure of detailed information about intangible assets [line items]
Additions		$ 600
License To Use Technology To Generate Antibody Drug Conjugates, ZYNLONTA (2) | License Payment
Disclosure of detailed information about intangible assets [line items]
Additions		$ 250

X

- Definition

The amount of additions to intangible assets other than goodwill, other than those acquired through business combinations. [Refer: Business combinations [member]; Intangible assets other than goodwill]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-IssueDate 2022-03-24
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-URIDate 2022-03-24

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Definition

The useful life, measured as period of time, used for intangible assets other than goodwill. [Refer: Intangible assets other than goodwill]

+ References

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