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

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Name:	us-gaap_LossContingenciesLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Contingencies and commitments (KANJINTI Patent Litigation) (Details) - patent	Sep. 04, 2019	Jul. 24, 2019	Jan. 17, 2019	Nov. 07, 2018	Jul. 19, 2018	Jun. 21, 2018
KANJINTI Patent Litigation
Loss Contingencies [Line Items]
Loss contingency, patents allegedly infringed	4	8	1	10	18	37