The amount of interest and other costs that an entity incurs in connection with the borrowing of funds that are recognised as an expense.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2027-01-01
-Name IAS
-Number 1
-IssueDate 2025-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2025-en-b&anchor=para_112_c&doctype=Standard
-URIDate 2025-03-27

Financing Activities - Additional Information (Details) SFr / shares in Units, $ / shares in Units, $ in Millions					6 Months Ended
	Nov. 03, 2025 CHF (SFr) SFr / shares shares	Nov. 03, 2025 USD ($) shares	Feb. 18, 2025 CHF (SFr) SFr / shares shares	Feb. 18, 2025 USD ($)	Jun. 30, 2026 CHF (SFr) SFr / shares shares	Jun. 30, 2026 USD ($) shares	Jun. 30, 2025 CHF (SFr)	Jun. 30, 2025 USD ($)	Nov. 03, 2025 $ / shares shares	Jul. 31, 2025 CHF (SFr) SFr / shares shares	Jul. 31, 2025 $ / shares	Feb. 18, 2025 $ / shares shares
Disclosure of detailed information about business combination [line items]
Transaction costs							SFr 6,800,000	$ 7.5
Total gross proceeds					SFr 47,775,000		90,227,000
Issuance of ordinary shares \| shares	2,635,801	2,635,801
Treasury shares held \| shares	2,796,297	2,796,297
Ordinary shares [member]
Disclosure of detailed information about business combination [line items]
Par value per share \| (per share)	SFr 16.33								$ 20.25
Total gross proceeds	SFr 88,700,000	$ 110.0
Warrants issued \| shares	5,432,098								5,432,098
Amended Loan Agreement
Disclosure of detailed information about business combination [line items]
Amounts drawn					SFr 0		SFr 0
Non-utilization fee percent					0.75%	0.75%
Follow-on public offering \| Ordinary shares [member]
Disclosure of detailed information about business combination [line items]
Par value per share \| (per share)			SFr 18.05									$ 20
Number of shares issued \| shares			5,000,000									5,000,000
Total gross proceeds			SFr 90,200,000	$ 100.0
Events after reporting period
Disclosure of detailed information about business combination [line items]
Remaining number of warrants \| shares										133,248
Events after reporting period \| Ordinary shares [member]
Disclosure of detailed information about business combination [line items]
Warrants issued \| shares										361,011
Events after reporting period \| Amended BlackRock Warrant
Disclosure of detailed information about business combination [line items]
Per share purchase price \| (per share)										SFr 15.07	$ 18.64
Events after reporting period \| Amended BlackRock Warrant \| Ordinary shares [member]
Disclosure of detailed information about business combination [line items]
Warrant vested and exercisable \| shares										59,310
Per share purchase price \| (per share)										SFr 9.84	$ 12.17
Events after reporting period \| Amended BlackRock Warrant \| Ordinary shares [member] \| Top of Range
Disclosure of detailed information about business combination [line items]
Warrants issued \| shares										494,259
Events after reporting period \| Amended Loan Agreement \| Top of Range
Disclosure of detailed information about business combination [line items]
Current borrowing capacity										SFr 75,000,000
Additional borrowings										25,000,000
Maximum borrowing capacity										100,000,000
Events after reporting period \| Amended Loan Agreement \| Loan 1
Disclosure of detailed information about business combination [line items]
Current borrowing capacity										25,000,000
Events after reporting period \| Amended Loan Agreement \| Loan 2
Disclosure of detailed information about business combination [line items]
Current borrowing capacity										25,000,000
Events after reporting period \| Amended Loan Agreement \| Loan 3
Disclosure of detailed information about business combination [line items]
Current borrowing capacity										SFr 25,000,000
At-the-Market Offering Program
Disclosure of detailed information about business combination [line items]
Par value per share \| SFr / shares					SFr 0.01
Issuance of ordinary shares \| shares					7,750,400	7,750,400
Aggregate maximum offering price					SFr 2,250,000,000
Transaction costs related to Registered Direct Offering					2,200,000
At-the-Market Offering Program \| Ordinary shares [member]
Disclosure of detailed information about business combination [line items]
Total gross proceeds					SFr 47,800,000	$ 61.3