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Debt with Unaffiliated Parties, Convertible Promissory Notes Payable, in Default (Details) - USD ($)
$ in Thousands
3 Months Ended
Aug. 06, 2020
Mar. 31, 2021
Dec. 31, 2020
Debt Instruments [Abstract]      
Accrued interest   $ 981 $ 1,021
Celularity's UltraMIST Assets [Member] | Seller Note [Member]      
Debt Instruments [Abstract]      
Paid for assets $ 24,000    
Issuance of promissory notes $ 4,000    
Maturity date   Aug. 06, 2021  
Accrued Interest Rate 5.00%    
Interest rate percentage 12.00%    
Accrued interest   $ 312 $ 192