Contracted storage periods.

No definition available.

Name:	CELU_ContractedStoragePeriods
Namespace Prefix:	CELU_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Instrument specific credit risk income.

+ References

No definition available.

+ Details

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

- Definition

Instrument specific credit risk loss.

+ References

No definition available.

+ Details

Name:	CELU_InstrumentSpecificCreditRiskLoss
Namespace Prefix:	CELU_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Payment plans for customer to pay over time period.

+ References

No definition available.

+ Details

Name:	CELU_PaymentPlansForCustomerToPayOverTimePeriod
Namespace Prefix:	CELU_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of allowance for credit loss on accounts receivable.

+ References

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+ Details

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

- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount, after tax, of impairment loss from asset representing future economic benefit arising from other asset acquired in business combination or from joint venture formation or both, that is not individually identified and separately recognized.

+ References

No definition available.

+ Details

Name:	us-gaap_GoodwillImpairmentLossNetOfTax
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Description of the likelihood that an uncertainty in income taxes will not be sustained as a result of the examination by the taxing authority.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 740
-SubTopic 10
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-Section 50
-Paragraph 15
-Subparagraph (e)
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The total expense recognized in the period for promotion, public relations, and brand or product advertising.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 220
-SubTopic 40
-Name Accounting Standards Codification
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-Subparagraph (SX 210.5-03(4))
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

+ References

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 280
-SubTopic 10
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-Name Accounting Standards Codification
-Section 50
-Paragraph 18
-Publisher FASB
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+ Details

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of a reclassification adjustment made to prior period financial statement amounts.

+ References

No definition available.

+ Details

Name:	us-gaap_PriorPeriodReclassificationAdjustment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- 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

No definition available.

+ Details

Name:	us-gaap_ProductInformationLineItems
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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-Topic 954
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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

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

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=CELU_TwoCustomersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=CELU_ThreeCustomersMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=CELU_CustomerOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_MajorCustomersAxis=CELU_CustomerTwoMember
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Data Type:	na
Balance Type:
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- Details

Name:	srt_RangeAxis=srt_MinimumMember
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Balance Type:
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- Details

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Data Type:	na
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- Details

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Summary of Significant Accounting Policies (Details Narrative) $ in Thousands	12 Months Ended
	Dec. 31, 2025 USD ($) Integer Segment	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Product Information [Line Items]
Reclassified from contingent consideration		$ 650
Restricted cash	$ 10,197	10,239
Accounts receivable balance, net of allowance for credit losses	$ 4,653	13,557	$ 10,046
Operating segments \| Segment	3
Advertising and marketing costs	$ 24	23
Instrument-specific credit risk income	$ 5
Instrument-specific credit risk loss		$ 5
Income tax examination likelihood settlement	The amount of the benefit that may be recognized is the largest amount that has a greater than 50% likelihood of being realized upon ultimate settlement with the tax authority.
Number of segments \| Integer	3
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Two Customers [Member]
Product Information [Line Items]
Concentration risk, percentage	37.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Three Customers [Member]
Product Information [Line Items]
Concentration risk, percentage		46.00%
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Customer One [Member]
Product Information [Line Items]
Concentration risk, percentage	21.00%	17.00%
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Customer Two [Member]
Product Information [Line Items]
Concentration risk, percentage	12.00%	16.00%
Minimum [Member]
Product Information [Line Items]
Contracted storage periods	18 years
Over time for a period	1 month
Maximum [Member]
Product Information [Line Items]
Contracted storage periods	25 years
Over time for a period	24 months
Cell Therapy [Member]
Product Information [Line Items]
Goodwill impairment	$ 0	$ 0
Letter of Credit [Member]
Product Information [Line Items]
Restricted cash	$ 10,197	$ 10,239