Area of building.

No definition available.

Name:	celu_AreaOfBuilding
Namespace Prefix:	celu_
Data Type:	dtr-types:areaItemType
Balance Type:	na
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

Leases.

+ References

No definition available.

+ Details

Name:	celu_LeasesLineItems
Namespace Prefix:	celu_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- 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

Option to renew lease term period.

+ References

No definition available.

+ Details

Name:	celu_OptionToRenewLeaseTermPeriod
Namespace Prefix:	celu_
Data Type:	xbrli:durationItemType
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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-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

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

- 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))
-Publisher FASB
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-Name Accounting Standards Codification
-Section 50
-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
-URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1

+ Details

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

- Details

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

- Details

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

- Details

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Leases - Additional Information (Details) $ in Thousands		3 Months Ended		6 Months Ended
Leases - Additional Information (Details) $ in Thousands	Mar. 13, 2019 USD ($) ft²	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) ft²	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Leases [Line Items]
Area of building \| ft²				147,215
Restricted cash		$ 14,825		$ 14,825		$ 14,836
Weighted average remaining lease term		22 years 9 months 18 days		22 years 9 months 18 days
Weighted average discount rate		11.12%		11.12%
Rent expense		$ 909	$ 940	$ 1,893	$ 1,923
Office, Manufacturing and Laboratory Space \| Florham Park, New Jersey \| Legacy Celularity
Leases [Line Items]
Area of building \| ft²	147,215
Operating lease expiry year	2036
Option to renew lease for two additional term period	5 years
Operating lease commencement date	Mar. 01, 2020
Initial monthly base rent	$ 230
Restricted cash		$ 14,722		$ 14,722		$ 14,722
Tenant improvement allowance	$ 14,722