Condensed Consolidated Statements of Shareholders' Equity (Parenthetical) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($)	Mar. 31, 2021 SFr / shares	Mar. 31, 2020 SFr / shares
Common shares, par value | SFr / shares		SFr 0.03
Stock Options [Member]
Issuance costs | $	$ 1.5
Common Shares [Member]
Issuance costs | $	$ 5.4
Common shares, par value | SFr / shares		SFr 0.03	SFr 0.03