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Equity method investments - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021 | Jul. 24, 2020
Related Party Transaction [Line Items] |  |  |  |  |  |
Equity method investments | $ 731 |  | $ 731 |  | $ 2,373 | $ 4,900
Equity method investment, ownership percentage | 49.00% |  | 49.00% |  |  |
Equity method investment, majority ownership percentage | 51.00% |  | 51.00% |  |  |
Equity method investment, period majority voting share capital can be sold to the company |  |  | 2 years 6 months |  |  |
Loss on equity method investments | $ 856 | $ 509 | $ 1,641 | $ 783 |  |
Oncacare |  |  |  |  |  |
Related Party Transaction [Line Items] |  |  |  |  |  |
Loan granted to related party |  |  |  |  | $ 10,000 |
Related party, loan interest rate |  |  |  |  | 1.60% |

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