XML 52 R33.htm IDEA: XBRL DOCUMENT v3.21.2

Description of Business and Basis of Presentation (Details) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)
Unusual Risk or Uncertainty [Line Items]
Accumulated deficit generated, since inception	$ (175,079)	$ (175,079)
COVID-19
Unusual Risk or Uncertainty [Line Items]
Percentage of R&D staff on site	100.00%
Percentage of time that office and general and administrative staff are on site	50.00%
AbbVie Collaboration | Collaboration Arrangement
Unusual Risk or Uncertainty [Line Items]
Cumulative catch-up adjustment to revenue		$ (3,404)
Cumulative catch-up adjustments to revenue, change in estimate	$ (4,480)

X

- Definition

Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from change in estimate of transaction price which (increases) decreases obligation to transfer good or service to customer for which consideration from customer has been received or is due. Includes, but is not limited to, change in assessment of whether estimate of variable consideration is constrained.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045

+ Details

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

X

- 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

No definition available.

+ Details

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

X

- Definition

Contract with Customer, Liability, Cumulative Catch-up Adjustments To Revenue, Change In Estimate

+ References

No definition available.

+ Details

Name:	xcur_ContractWithCustomerLiabilityCumulativeCatchUpAdjustmentsToRevenueChangeInEstimate
Namespace Prefix:	xcur_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Office And General And Administrative Staff On Site, Percentage

+ References

No definition available.

+ Details

Name:	xcur_OfficeAndGeneralAndAdministrativeStaffOnSitePercentage
Namespace Prefix:	xcur_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Research and Development Staff on Site, Percentage

+ References

No definition available.

+ Details

Name:	xcur_ResearchAndDevelopmentStaffOnSitePercentage
Namespace Prefix:	xcur_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Retained Earnings (Accumulated Deficit), Inception to Date

+ References

No definition available.

+ Details

Name:	xcur_RetainedEarningsAccumulatedDeficitInceptiontoDate
Namespace Prefix:	xcur_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_UnusualOrInfrequentItemAxis=xcur_COVID19Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	xcur_ArrangementNameAxis=xcur_AbbVieCollaborationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

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