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Taxation (Details) - CHF (SFr)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Taxation [Abstract]              
Deferred income tax expense     SFr (21,415) SFr (32,761)
Deferred income tax gain     26,179 24,573 39,188 131,055 32,761
Total income tax gain SFr 8,726 SFr 8,191 SFr 26,179 SFr 24,573 SFr 17,773 SFr 131,055