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Contract revenues - Grants from the Michael J. Fox Foundation (Details) SFr in Thousands, $ in Millions | 1 Months Ended | 12 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Aug. 31, 2022 CHF (SFr) | Aug. 31, 2022 USD ($) | Dec. 31, 2022 CHF (SFr) item | Dec. 31, 2021 CHF (SFr) | Dec. 31, 2020 CHF (SFr) | Aug. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | May 31, 2020 CHF (SFr) | May 31, 2020 USD ($)
Contract revenues |  |  |  |  |  |  |  |  |
Revenue from contracts with customers |  |  | SFr 3,935 | SFr 0 | SFr 15,431 |  |  |  |
Income from grants |  |  | 1,343 | 1,182 | 1,353 |  |  |  |
Accrued income |  |  | 408 | 975 |  |  |  |  |
Deferred income |  |  | 587 | 717 |  |  |  |  |
Grant from Michael J. Fox Foundation |  |  |  |  |  |  |  |  |
Contract revenues |  |  |  |  |  |  |  |  |
Revenue from contracts with customers |  |  | 1,200 | 1,100 | SFr 1,300 |  |  |  |
Accrued income |  |  | 300 | 900 |  |  |  |  |
Deferred income |  |  | SFr 500 |  |  |  |  |  |
Grant from Michael J. Fox Foundation | Alpha-synuclein PET imaging diagnostic agent |  |  |  |  |  |  |  |  |
Contract revenues |  |  |  |  |  |  |  |  |
Follow-on grant funding received, total for joint arrangement | SFr 500 | $ 0.5 |  |  |  |  |  |  |
Follow-on grant funding received | 400 | $ 0.4 |  |  |  |  |  |  |
Total potential collaboration agreement value |  |  |  |  |  |  |  | SFr 3,000 | $ 3.2
Eligible grant amount receivable |  |  |  |  |  |  |  | 2,300 | 2.5
Grant from Michael J. Fox Foundation | Alpha-synuclein PET imaging diagnostic agent | Skane University Hospital |  |  |  |  |  |  |  |  |
Contract revenues |  |  |  |  |  |  |  |  |
Eligible grant amount receivable | SFr 100 |  |  |  |  | $ 0.1 |  | SFr 700 | 0.7
Grant from Michael J. Fox Foundation | Alpha-synuclein PET imaging diagnostic agent | Minimum |  |  |  |  |  |  |  |  |
Contract revenues |  |  |  |  |  |  |  |  |
Period of joint research agreement |  |  | 2 years |  |  |  |  |  |
Grant from Michael J. Fox Foundation | Advance small molecule PD programs |  |  |  |  |  |  |  |  |
Contract revenues |  |  |  |  |  |  |  |  |
Number of grants received | item |  |  | 2 |  |  |  |  |  |
Total potential collaboration agreement value |  |  |  | SFr 1,400 |  |  | $ 1.5 |  |
Grant from Michael J. Fox Foundation | Skane University Hospital |  |  |  |  |  |  |  |  |
Contract revenues |  |  |  |  |  |  |  |  |
Eligible grant amount receivable | $ |  |  |  |  |  |  |  |  | $ 0.7

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