Share Capital - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2023 USD ($) $ / shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2023 SFr / shares shares	Jun. 08, 2023 CHF (SFr) shares	Jun. 08, 2023 $ / shares	Dec. 31, 2022 SFr / shares shares
Class of Stock [Line Items]
Common stock, shares authorized | shares				126,536,183			150,347,467
Common shares, par value | SFr / shares				SFr 0.03			SFr 0.03
Proceeds from issuance of common shares	$ 32,721,000	$ 970,000	$ 213,267,000
Common Stock, Voting Rights	one vote for each common share
Dividends declared and paid	$ 0
Common shares employee equity incentive plans | shares				20,989,313
Issuance of common shares, net of issuance costs	32,394,000	$ 970,000	$ 222,175,000
Corporate Bond Securities [Member]
Class of Stock [Line Items]
Capital reserved for future issuance | shares				8,202,832
Sales Agreement With Jefferies LLC [Member]
Class of Stock [Line Items]
Common shares issued | shares				1,500,000
Proceeds from issuance of common shares	$ 211,500,000
Average issue price of common shares | $ / shares	$ 139.91
Issuance of common shares, net of issuance costs	$ 385,600,000
Common shares [Member]
Class of Stock [Line Items]
Common shares, par value | (per share)				SFr 0.03		$ 0.03
Registered share capital | shares				83,538,347	13,805,691
Common shares [Member] | Maximum [Member]
Class of Stock [Line Items]
Common Stock Share Capital Value | SFr					SFr 2,920,321.14
Common shares [Member] | Minimum [Member]
Class of Stock [Line Items]
Common Stock Share Capital Value | SFr					SFr 2,506,150.41
2019 ATM [Member] | Sales Agreement With Jefferies LLC [Member]
Class of Stock [Line Items]
Common shares issued | shares			1,400,000	500,000
Proceeds from issuance of common shares	32,700,000		$ 224,500,000
Equity issuance costs	400,000		3,100,000
Payments of stamp taxes related to securities	$ 300,000		$ 2,300,000
Average issue price of common shares | $ / shares	$ 72.32		$ 168.23
2021 ATM [Member] | Sales Agreement With Jefferies LLC [Member]
Class of Stock [Line Items]
Equity issuance costs	$ 2,900,000