Name:	cue_AggregateAmountOfAdditionalMilestonePaymentsMaximum
Namespace Prefix:	cue_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Aggregate amount of milestone payments for each new indication of licensed product, maximum.

No definition available.

Name:	cue_AggregateAmountOfMilestonePaymentsForEachNewIndicationOfLicensedProductMaximum
Namespace Prefix:	cue_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The maximum aggregate amount of milestone payments for each product, process or service.

No definition available.

Name:	cue_AggregateAmountOfMilestonePaymentsForEachProductProcessOrServiceMaximum
Namespace Prefix:	cue_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Commitments and contingencies

No definition available.

Name:	cue_CommitmentsAndContingenciesLineItems
Namespace Prefix:	cue_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 220
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Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 924
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-Subparagraph (SAB Topic 11.L)
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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Name:	us-gaap_CostOfGoodsAndServicesSold
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Indicates type of cost from product sold and service rendered.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 606
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