Loss per share (Details)	12 Months Ended
Dec. 31, 2019 CHF (SFr) EquityInstruments item SFr / shares shares	Dec. 31, 2018 CHF (SFr) EquityInstruments item SFr / shares shares	Dec. 31, 2017 CHF (SFr) EquityInstruments item SFr / shares shares
Earnings per share
Loss attributable to equity holders of the Company \| SFr	SFr (14,780,604)	SFr (1,644,798)	SFr (3,280,406)
Weighted average number of shares in issue \| shares	26,428,269	23,293,237	12,941,439
Basic and diluted loss per share \| SFr / shares	SFr (0.56)	SFr (0.07)	SFr (0.25)
Number of categories of dilutive potential shares \| item	3	3	3
Number of potential dilutive instruments	11,906,248	11,561,178	3,237,029
ESCs
Earnings per share
Number of potential dilutive instruments	198,750	265,600	275,933
ESOP
Earnings per share
Number of potential dilutive instruments	5,540,600	5,128,680	2,661,096
Warrants
Earnings per share
Number of potential dilutive instruments	6,166,898	6,166,898	300,000

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Number of potential dilutive instruments

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The amount of earnings per share when the basic and diluted measurements are equal. [Refer: Basic earnings (loss) per share; Diluted earnings (loss) per share]

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

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The profit (loss) attributable to ordinary equity holders of the parent entity. [Refer: Profit (loss)]

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The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor.

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