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Business combinations - Narrative, MedPass Group Acquisition (Details) - Medpass Group Limited - USD ($) $ in Millions | 11 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2020 | Jan. 22, 2020
Business Acquisition [Line Items] |  |  |
Percentage of share capital acquired |  |  | 100.00%
Accounts receivable adjustment |  | $ 0.2 |
Unearned revenue adjustment |  | 0.8 |
Operating right-to-use assets fair value adjustment |  | 0.8 |
Other liabilities adjustment |  | 0.8 |
Operating current lease liabilities fair value adjustment |  | 0.1 |
Operating non-current lease liabilities fair value adjustment |  | 0.7 |
Operating non-current deferred tax liability fair value adjustment |  | $ 0.6 |
Revenue of acquiree since acquisition date | $ 13.2 |  |
Net income of acquiree since acquisition date | $ 2.5 |  |

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