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Significant agreements (Details) $ in Thousands	1 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) tradingDay	Dec. 31, 2023 USD ($)	Jun. 09, 2021 USD ($)
Ligand UK Development Limited
Capitalized Contract Cost [Line Items]
Sublicense Payment	$ 2,000
Sublicense Payment, Equity Issuance, Threshold Trading Days | tradingDay	10
Ligand UK Development Limited | Selling, General and Administrative Expenses
Capitalized Contract Cost [Line Items]
Sublicense Payment	$ 2,000
Ligand UK Development Limited | First Commercial Sale
Capitalized Contract Cost [Line Items]
Sublicense Payment	$ 15,000
Nuance (Shanghai) Pharma Co Ltd
Capitalized Contract Cost [Line Items]
Transaction price			$ 40,000
Accounts receivable			25,000
Equity interest receivable		$ 15,000	15,000
Future eligible milestone payments			$ 179,000
Contract with Customer, Liability, Revenue Recognized		$ 500

X

- Definition

Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 9
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481990/310-10-45-9

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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 340
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479483/340-40-50-3

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- Definition

Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 8
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-8

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Period Type:	duration

X

- Definition

Amount of transaction price allocated to performance obligation that has not been recognized as revenue.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (a)
-SubTopic 10
-Topic 606
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-13

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Contract With Customer, Future Eligible Milestone Payments

+ References

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- Definition

Equity Interest Receivable

+ References

No definition available.

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- Definition

Sublicense Payment

+ References

No definition available.

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- Definition

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