Agreements with Arena Pharmaceuticals, Inc. - Additional Information (Details) - Arena Pharmaceuticals Inc [Member] - USD ($) $ in Thousands	1 Months Ended
Oct. 31, 2020	Sep. 30, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Renew of successive agreement term	1 year
Related party amounts related to accounts payable		$ 342,000	$ 241,000
Payments of related party	$ 100

The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3291-108585

Name:	us-gaap_RepaymentsOfRelatedPartyDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration