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Contract revenues and other operating income - Grant income (Details) SFr in Thousands, $ in Millions | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2026 CHF (SFr) | Jun. 30, 2025 CHF (SFr) | Jun. 11, 2026 USD ($) | Jun. 11, 2026 CHF (SFr) | Dec. 31, 2025 CHF (SFr)
Contract revenues |  |  |  |  |
Income from grants | SFr 107 | SFr 21 |  |  |
Revenue from contracts with customers | 16,232 | SFr 2,296 |  |  |
Accrued income | 209 |  |  |  | SFr 360
Other current receivables | 3,514 |  |  |  | SFr 978
Current deferred income | 1,292 |  |  |  |
Grant from Vijay and Marie Goradia Charitable Foundation |  |  |  |  |
Contract revenues |  |  |  |  |
Grants, amount receivable |  |  | $ 4 | SFr 3,200 |
Deferred income | 3,100 |  | 4 | 3,200 |
Income from grants | 100 |  |  |  |
Other current receivables |  |  | $ 4 | SFr 3,200 |
Current deferred income | SFr 1,300 |  |  |  |

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