Financial instruments and risk management (Details) - CHF (SFr) |
12 Months Ended | |
|---|---|---|
Dec. 31, 2022 |
Dec. 31, 2021 |
|
| Financial instruments and risk management (Details) [Line Items] | ||
| Increase or decrease in rate (as a percent) | 5.00% | |
| USD [Member] | ||
| Financial instruments and risk management (Details) [Line Items] | ||
| Increase or decrease in rate (as a percent) | 5.00% | |
| Impact of increase or decrease in rate on net result | SFr 10,913 | SFr 77,827 |
| EUR [member] | ||
| Financial instruments and risk management (Details) [Line Items] | ||
| Impact of increase or decrease in rate on net result | SFr 82,850 | 117,247 |
| Australian dollar [Member] | ||
| Financial instruments and risk management (Details) [Line Items] | ||
| Increase or decrease in rate (as a percent) | 5.00% | |
| Impact of increase or decrease in rate on net result | SFr 43,977 | SFr 63,714 |