Financial risk management (Details) - CHF (SFr)	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financial risk management
Interest-bearing debt	SFr 0
Short-term debt	0	SFr 0
Long-term debt	SFr 0	SFr 0
Foreign exchange risk
Financial risk management
Subsequent period of currency transactions economically hedged	12 months
Foreign exchange risk \| EUR
Financial risk management
Percentage of reasonably possible increase in risk assumption	10.00%	10.00%	10.00%
Increase (decrease) in net income due to reasonably possible increase in risk assumption	SFr (7,945)	SFr 7,948	SFr (4,064)
Increase (decrease) in shareholders' equity due to reasonably possible increase in risk assumption	SFr (7,945)	SFr 7,948	SFr (4,064)
Percentage of reasonably possible decrease in risk assumption	(10.00%)	(10.00%)	(10.00%)
Increase (decrease) in net income due to reasonably possible decrease in risk assumption	SFr 7,945	SFr (7,948)	SFr 4,064
Increase (decrease) in shareholders' equity due to reasonably possible decrease in risk assumption	SFr 7,945	SFr (7,948)	SFr 4,064
Foreign exchange risk \| GBP
Financial risk management
Percentage of reasonably possible increase in risk assumption	10.00%	10.00%	10.00%
Increase (decrease) in net income due to reasonably possible increase in risk assumption	SFr 1,470	SFr (17,893)	SFr (14,723)
Increase (decrease) in shareholders' equity due to reasonably possible increase in risk assumption	SFr 1,470	SFr (17,893)	SFr (14,723)
Percentage of reasonably possible decrease in risk assumption	(10.00%)	(10.00%)	(10.00%)
Increase (decrease) in net income due to reasonably possible decrease in risk assumption	SFr (1,470)	SFr 17,893	SFr 14,723
Increase (decrease) in shareholders' equity due to reasonably possible decrease in risk assumption	SFr (1,470)	SFr 17,893	SFr 14,723
Foreign exchange risk \| USD
Financial risk management
Percentage of reasonably possible increase in risk assumption	10.00%	10.00%	10.00%
Increase (decrease) in net income due to reasonably possible increase in risk assumption	SFr 175,837	SFr 1,027,027	SFr 644,865
Increase (decrease) in shareholders' equity due to reasonably possible increase in risk assumption	SFr 175,837	SFr 1,027,027	SFr 644,865
Percentage of reasonably possible decrease in risk assumption	(10.00%)	(10.00%)	(10.00%)
Increase (decrease) in net income due to reasonably possible decrease in risk assumption	SFr (175,837)	SFr (1,027,027)	SFr (644,865)
Increase (decrease) in shareholders' equity due to reasonably possible decrease in risk assumption	SFr (175,837)	SFr (1,027,027)	SFr (644,865)
Foreign exchange risk \| Minimum
Financial risk management
Percentage of currency transactions economically hedged	50.00%
Foreign exchange risk \| Maximum
Financial risk management
Percentage of currency transactions economically hedged	100.00%

Increase (decrease) in equity due to reasonably possible decrease in designated risk component

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- Definition

Increase (decrease) in equity due to reasonably possible increase in designated risk component

+ References

No definition available.

+ Details

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- Definition

Increase (decrease) in profit or loss due to reasonably possible decrease in designated risk component

+ References

No definition available.

+ Details

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- Definition

Increase (decrease) in profit or loss due to reasonably possible increase in designated risk component

+ References

No definition available.

+ Details

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- Definition

Interest-bearing debt

+ References

No definition available.

+ Details

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- Definition

Percentage of currency transactions economically hedged

+ References

No definition available.

+ Details

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- Definition

Percentage of reasonably possible decrease in risk assumption

+ References

No definition available.

+ Details

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- Definition

Percentage of reasonably possible increase in risk assumption

+ References

No definition available.

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- Definition

Subsequent period of currency transactions economically hedged

+ References

No definition available.

+ Details

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- Definition

The amount of current borrowings and current portion of non-current borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2022-03-24
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_55&doctype=Standard
-URIDate 2022-03-24

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Definition

The non-current portion of non-current borrowings. [Refer: Borrowings]

+ References

+ Details

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