Additional Milestone Payments

No definition available.

Name:	cue_AdditionalMilestonePayments
Namespace Prefix:	cue_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Collaboration and License Agreement Description

+ References

No definition available.

+ Details

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

- Definition

Commercial Milestone Payments

+ References

No definition available.

+ Details

Name:	cue_CommercialMilestonePayments
Namespace Prefix:	cue_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Development and Regulatory Milestone Payments

+ References

No definition available.

+ Details

Name:	cue_DevelopmentAndRegulatoryMilestonePayments
Namespace Prefix:	cue_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

lump sum Payment

+ References

No definition available.

+ Details

Name:	cue_LumpSumPayment
Namespace Prefix:	cue_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Milestone Payment

+ References

No definition available.

+ Details

Name:	cue_MilestonePayment
Namespace Prefix:	cue_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Sublicensing Revenues Received Percentage

+ References

No definition available.

+ Details

Name:	cue_SublicensingRevenuesReceivedPercentage
Namespace Prefix:	cue_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Technology Transfer Payments

+ References

No definition available.

+ Details

Name:	cue_TechnologyTransferPayments
Namespace Prefix:	cue_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Upfront Payment

+ References

No definition available.

+ Details

Name:	cue_UpfrontPayment
Namespace Prefix:	cue_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(4))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 505
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481112/505-10-50-3

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Face amount or stated value per share of common stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_CommonStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash inflow associated with the amount received from entity's first offering of stock to the public.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 14
-Subparagraph (a)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-14

+ Details

Name:	us-gaap_ProceedsFromIssuanceInitialPublicOffering
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482740/230-10-45-28

+ Details

Name:	us-gaap_SeveranceCosts1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480429/718-10-50-2

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- 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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

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

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_WarrantMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=cue_PreFundedWarrantsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementEquityComponentsAxis=us-gaap_CommonStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Additional Information) (Details) - USD ($)	Apr. 30, 2026	Apr. 27, 2026	Apr. 01, 2026	May 31, 2026	May 04, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025
Subsequent Event [Line Items]
Common stock, par value						$ 0.001	$ 0.001
BI Collaboration and License Agreement
Subsequent Event [Line Items]
Upfront payment								$ 10,100,000
Subsequent Event
Subsequent Event [Line Items]
Milestone payment	$ 676,500,000
Technology transfer payments	$ 6,500,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant		3,000,000
Cash Severance Payment		$ 474,010.27
lump sum Payment		$ 110,000
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 11
Proceeds from Issuance Initial Public Offering	$ 27,600,000
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	551,724
Upfront payment	$ 15,000,000
Subsequent Event \| BI Collaboration and License Agreement
Subsequent Event [Line Items]
Milestone payment			$ 7,500,000	$ 7,500,000
Subsequent Event \| Collaboration and License Agreement
Subsequent Event [Line Items]
Collaboration and License Agreement Description			On April 1, 2026, the Company received notice from BI that a milestone event was achieved under the BI Collaboration and License Agreement, which triggered a $7.5 million payment to the Company that was received in May 2026. See Note 11.
Subsequent Event \| Underwriting Agreement
Subsequent Event [Line Items]
Milestone payment					$ 15,000,000
Subsequent Event \| License Agreement
Subsequent Event [Line Items]
Milestone payment	215,000,000
Additional Milestone Payments	5,000,000
Development and regulatory milestone payments	205,000,000
Commercial milestone payments	$ 460,000,000
Subsequent Event \| Warrants
Subsequent Event [Line Items]
Common stock, par value	$ 11
Subsequent Event \| Pre-Funded Warrants
Subsequent Event [Line Items]
Class of Warrant or Right, Exercise Price of Warrants or Rights	$ 0.001
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	2,727,272
Subsequent Event \| Common Stock
Subsequent Event [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	1,363,636
Subsequent Event \| Maximum \| License Agreement
Subsequent Event [Line Items]
Sublicensing revenues received percentage	40.00%
Subsequent Event \| Minimum \| License Agreement
Subsequent Event [Line Items]
Sublicensing revenues received percentage	20.00%