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Share capital - Convertible note agreement (Details) $ in Millions | 12 Months Ended |
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Dec. 31, 2022 CHF (SFr) agreement | Dec. 31, 2022 USD ($) | Dec. 31, 2021 CHF (SFr) shares | Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 CHF (SFr) | Dec. 31, 2022 USD ($) agreement
Convertible Note Agreement [Abstract] |  |  |  |  |  |
Net proceeds | SFr | SFr 0 |  | SFr 23,463,000 |  | SFr 0 |
Convertible note agreements |  |  |  |  |  |
Convertible Note Agreement [Abstract] |  |  |  |  |  |
Number of separate convertible note agreements | agreement | 2 |  |  |  |  | 2
Aggregate principal amount of each convertible note | SFr 11,700,000 |  |  |  |  | $ 12.5
Proceeds from conversion of convertible debt, per individual note |  |  | SFr 11,700,000 | $ 12.5 |  |
Number of shares issued through conversion of convertible notes |  |  | 3,026,634 | 3,026,634 |  |
Outstanding equity or cash consideration due under convertible note agreements | SFr |  |  | SFr 0 |  |  |
Convertible note agreements | Athos Service GmbH [Member] |  |  |  |  |  |
Convertible Note Agreement [Abstract] |  |  |  |  |  |
Number of shares issued through conversion of convertible notes |  |  | 1,513,317 | 1,513,317 |  |
Convertible note agreements | First Capital Partner GmbH [Member] |  |  |  |  |  |
Convertible Note Agreement [Abstract] |  |  |  |  |  |
Number of shares issued through conversion of convertible notes |  |  | 1,513,317 | 1,513,317 |  |
Convertible note agreements | Top of Range [Member] | If notes are converted |  |  |  |  |  |
Convertible Note Agreement [Abstract] |  |  |  |  |  |
Net proceeds | SFr 23,500,000 | $ 25.0 |  |  |  |

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- Definition Aggregate principal amount of each convertible note + References No definition available. + Details
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- References No definition available. + Details
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- Definition The increase in the number of ordinary shares issued under a convertible debt arrangement upon conversion of the debt. + References No definition available. + Details
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- Definition The number of convertible note agreements + References No definition available. + Details
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- Definition Outstanding equity or cash consideration due under convertible note agreements + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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- Details
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