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Fair Value of Financial Assets and Liabilities - Schedule of Yorkville short-term debt valuation model (Details) | 12 Months Ended
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Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Common share price | 1.29
Credit spread | 13.71%
Dividend yield | 0.00%
Term (years) | 8 months 15 days
Discount yield | 18.46%
Measurement Input Risk Free Interest Rate [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Valuation input for short-term debt | 4.75%
Measurement Input Price Volatility [Member] |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Valuation input for short-term debt | 45.00%

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- Definition Valuation input for short-term debt credit spread. + References No definition available. + Details
Name: | celu_ValuationInputForShortTermDebtCreditSpread
Namespace Prefix: | celu_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Valuation input for short-term debt discount yield. + References No definition available. + Details
Name: | celu_ValuationInputForShortTermDebtDiscountYield
Namespace Prefix: | celu_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Valuation Input for short-term debt dividend yield. + References No definition available. + Details
Name: | celu_ValuationInputForShortTermDebtDividendYield
Namespace Prefix: | celu_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Valuation input for short-term debt share price. + References No definition available. + Details
Name: | celu_ValuationInputForShortTermDebtSharePrice
Namespace Prefix: | celu_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition Valuation input for short-term debt term. + References No definition available. + Details
Name: | celu_ValuationInputForShortTermDebtTerm
Namespace Prefix: | celu_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Valuation input for short-term debt. + References No definition available. + Details
Name: | celu_ValuationinputforshortTermdebt
Namespace Prefix: | celu_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- 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_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputRiskFreeInterestRateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_MeasurementInputTypeAxis=us-gaap_MeasurementInputPriceVolatilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |