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Contingencies and commitments (MVASI Patent Litigation) (Details) - Mvasi Patent Litigation, Genentech, Inc. (Genentech) and the City of Hope | Oct. 29, 2019 patent | Mar. 29, 2019 patent | Aug. 31, 2018 patent lawsuit | Oct. 18, 2017 patent | Oct. 06, 2017 patent
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Other Commitments [Line Items] |  |  |  |  |
Loss contingency, patents allegedly infringed | 6 |  | 8 | 25 | 24
Number of patents allegedly infringed |  | 14 |  | 27 | 27
Number of lawsuits filed | lawsuit |  |  | 2 |  |

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- Details
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