XML 49 R43.htm IDEA: XBRL DOCUMENT v3.24.1.u1

Subsequent Events - Additional Information (Details) - Subsequent Events - Collaboration Agreement $ in Millions	Apr. 04, 2024 USD ($)
Subsequent Event [Line Items]
Agreement date	Apr. 04, 2024
BiBo Biopharma Engineering Co., Ltd.
Subsequent Event [Line Items]
Aggregate payment of production facility	$ 135.0
Percentage of production facility payment payable	45.00%
Additional percentage of milestones payment payable upon achievement	45.00%

X

- Definition

Additional percentage of milestones payment payable upon achievement.

+ References

No definition available.

+ Details

Name:	etnb_AdditionalPercentageOfMilestonesPaymentPayableUponAchievement
Namespace Prefix:	etnb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Collaboration agreement date.

+ References

No definition available.

+ Details

Name:	etnb_CollaborationAgreementDate
Namespace Prefix:	etnb_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of production facility payment payable.

+ References

No definition available.

+ Details

Name:	etnb_PercentageOfProductionFacilityPaymentPayable
Namespace Prefix:	etnb_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Production facility payment payable.

+ References

No definition available.

+ Details

Name:	etnb_ProductionFacilityPaymentPayable
Namespace Prefix:	etnb_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 830
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481674/830-30-50-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 855
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483399/855-10-50-2

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=etnb_CollaborationAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_BusinessAcquisitionAxis=etnb_BiboBiopharmaEngineeringCoLtdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: