Basis of preparation (Details)
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12 Months Ended |
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Mar. 04, 2021
CHF (SFr)
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Dec. 01, 2020
CHF (SFr)
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Dec. 31, 2022
CHF (SFr)
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Dec. 31, 2022
USD ($)
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Dec. 31, 2022
USD ($)
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Dec. 31, 2021
CHF (SFr)
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| Basis of preparation (Details) [Line Items] |
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| Total cash | SFr |
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SFr 15,395
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SFr 984,191
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| Cash and cash equivalents (in Francs) | SFr |
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15,000
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| Issuance of common shares | $ |
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$ 5,100,000
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| Convertible loan |
SFr 604,545
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SFr 895,455
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2,500,000
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| Milestone payment |
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700,000
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1,000,000
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| Tax asset (in Francs) | SFr |
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SFr 41,430
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SFr 31,879
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| OligoPhore™ [Member] |
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| Basis of preparation (Details) [Line Items] |
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| Financing instruments | $ |
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12,900,000
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| SemaPhore™ [Member] |
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| Basis of preparation (Details) [Line Items] |
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| Financing instruments | $ |
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$ 9,100,000
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| Switzerland [Member] |
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| Basis of preparation (Details) [Line Items] |
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| Tax term |
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7 years
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7 years
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| United States [Member] |
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| Basis of preparation (Details) [Line Items] |
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| Tax term |
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20 years
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20 years
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| Bottom of range [member] |
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| Basis of preparation (Details) [Line Items] |
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| Total cash | SFr |
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SFr 15,000,000
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| Bottom of range [member] | Board of Directors [Member] |
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| Basis of preparation (Details) [Line Items] |
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| Total cash | $ |
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$ 15
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| Top of range [member] |
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| Basis of preparation (Details) [Line Items] |
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| Total cash | SFr |
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SFr 17,000,000
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| Top of range [member] | Board of Directors [Member] |
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| Basis of preparation (Details) [Line Items] |
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| Total cash | $ |
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$ 17,000,000
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