Area of building.

No definition available.

Name:	CELU_AreaOfBuilding
Namespace Prefix:	CELU_
Data Type:	dtr-types:areaItemType
Balance Type:	na
Period Type:	duration

- Definition

Base rental payments.

+ References

No definition available.

+ Details

Name:	CELU_BaseRentalPayments
Namespace Prefix:	CELU_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Initial monthly base rent.

+ References

No definition available.

+ Details

Name:	CELU_InitialMonthlyBaseRent
Namespace Prefix:	CELU_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

New line of credit.

+ References

No definition available.

+ Details

Name:	CELU_NewLineOfCredit
Namespace Prefix:	CELU_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Operating lease commencement date.

+ References

No definition available.

+ Details

Name:	CELU_OperatingLeaseCommencementDate
Namespace Prefix:	CELU_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Operating lease expiry year.

+ References

No definition available.

+ Details

Name:	CELU_OperatingLeaseExpiryYear
Namespace Prefix:	CELU_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

- Definition

Operating leases rent expense.

+ References

No definition available.

+ Details

Name:	CELU_OperatingLeasesRentExpense
Namespace Prefix:	CELU_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Reduction in line of credit.

+ References

No definition available.

+ Details

Name:	CELU_ReductionInLineOfCredit
Namespace Prefix:	CELU_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Description of terms and conditions of option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

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

- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479589/842-20-55-53

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-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (g)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-4

+ Details

Name:	us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479589/842-20-55-53

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (g)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-4

+ Details

Name:	us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

+ Details

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

- Definition

Amount of cash restricted as to withdrawal or usage, classified as noncurrent. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(17))
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-Name Accounting Standards Codification
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-Paragraph 8
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482913/230-10-50-8

+ Details

Name:	us-gaap_RestrictedCashNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Carrying amount as of the balance sheet date of improvements having a life longer than one year that were made for the benefit of one or more tenants.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(1)(d))
-Publisher FASB
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1

+ Details

Name:	us-gaap_TenantImprovements
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	srt_StatementGeographicalAxis=CELU_FlorhamParkNewJerseyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=CELU_OfficeManufacturingAndLaboratorySpaceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=CELU_LegacyCelularityMember
Namespace Prefix:
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Balance Type:
Period Type:

Leases (Details Narrative) $ in Thousands			3 Months Ended		6 Months Ended
Leases (Details Narrative) $ in Thousands	Sep. 14, 2023 USD ($)	Mar. 13, 2019 USD ($) ft²	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Dec. 31, 2024 USD ($)
Property, Plant and Equipment [Line Items]
Rent expense			$ 1,115	$ 1,112	$ 2,229	$ 2,219
Letter of credit			$ 10,073		$ 10,073		$ 10,239
Weighted average remaining lease term			20 years 9 months 18 days		20 years 9 months 18 days
Weighted average discount rate			14.24%		14.24%
Florham Park New Jersey [Member]
Property, Plant and Equipment [Line Items]
Reduction in line of credit	$ 4,900
New line of credit	9,883
Base rental payments	$ 400
Office Manufacturing and Laboratory Space [Member] \| Florham Park New Jersey [Member] \| Legacy Celularity [Member]
Property, Plant and Equipment [Line Items]
Area of building \| ft²		147,215
Operating lease expiry year		2036
Option to renew lease term period.		option to renew the term of the lease for two additional five-year terms
Operating lease commencement date		Mar. 01, 2020
Initial monthly base rent		$ 230
Letter of credit		14,722
Tenant improvement allowance		$ 14,722