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

Leases.

+ References

No definition available.

+ Details

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

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

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

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
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+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

+ Details

Name:	us-gaap_OperatingLeaseLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-1

+ Details

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

- 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
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-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
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-Subparagraph (g)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-4

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Name:	us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
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
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-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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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
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+ Details

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

- Details

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- Details

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- Details

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Leases - Additional Information (Details) $ in Thousands			3 Months Ended
Leases - Additional Information (Details) $ in Thousands	Sep. 14, 2023 USD ($)	Mar. 13, 2019 USD ($) ft²	Mar. 31, 2024 USD ($) ft²	Mar. 31, 2023 USD ($)	Dec. 31, 2023 USD ($)
Leases [Line Items]
Area of building \| ft²			147,215
Restricted cash			$ 10,046		$ 9,936
Weighted average remaining lease term			22 years
Weighted average discount rate			14.24%
Rent expense			$ 1,107	$ 984
Right-of-use assets - operating leases			10,945		$ 10,990
Operating lease liability			26,265
Florham Park, New Jersey
Leases [Line Items]
Reduction in line of credit	$ 4,900
New line of credit	9,883
Base rental payments	400
Right-of-use assets - operating leases	2,083
Operating lease liability	$ 2,083
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
Line of credit			$ 14,722
Tenant improvement allowance		$ 14,722