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Summary of significant accounting policies, Income taxes (Details) SFr in Thousands	12 Months Ended
	Dec. 31, 2022 CHF (SFr)
Income taxes [Abstract]
Tax loss carryforward period	7 years
Deferred tax assets	SFr 0

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- Definition

The period or time limit over which financial losses of the entity for preceding years can be deducted from the taxable revenue for a period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- Definition

The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]]

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2021-01-01
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-Subparagraph g
-Clause i
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-URIDate 2021-03-24

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_56&doctype=Standard
-URIDate 2021-03-24

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Period Type:	instant

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- References

No definition available.

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