Equity - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands									1 Months Ended	3 Months Ended	9 Months Ended
	Sep. 14, 2023	Jul. 31, 2023	May 18, 2023	Apr. 10, 2023	Mar. 20, 2023	Sep. 08, 2022	May 18, 2022	Mar. 01, 2022	Jul. 31, 2023	Sep. 30, 2023	Sep. 30, 2023	Sep. 30, 2022	Jul. 14, 2023	Dec. 31, 2022	Dec. 31, 2021
Stockholders Equity Details [Line Items]
Common stock, shares authorized										730,000,000	730,000,000		110,000,000	730,000,000
Common stock, par value (in Dollars per share)										$ 0.0001	$ 0.0001			$ 0.0001
Common stock, voting Rights											common stock are entitled to one vote per share
Preferred stock, shares authorized										10,000,000	10,000,000			10,000,000
Preferred stock, shares outstanding										0	0			0
Class of warrant or right, outstanding										70,706,345	70,706,345
Warrants to purchase aggregate shares		8,928,572							8,928,572
Purchase price of per share		$ 0.35		$ 0.65					$ 0.35
Proceeds from PIPE financings											$ 12,750	$ 30,000
Fair value of modified warrant, incremental expense										$ 402	402
Exercise price				$ 0.75
Reduced exercise price									$ 0.35
Fair value of the warrant liability		$ 2,645		$ 4,280					$ 2,645	3,735	3,735			$ 3,598	$ 25,962
Proceeds from the exercise of warrants		$ 3,000		$ 6,000								$ 46,490
Warrant term		5 years		5 years
Debt instrument payment		$ 2,740		$ 5,505
Warrant liabilities		$ 511							$ 511	$ 3,735	$ 3,735			$ 3,598
May 2022 PIPE Warrants
Stockholders Equity Details [Line Items]
Reduced exercise price				$ 0.75					$ 0.35
Amended termination date description				date to five and one-half years following the closing of the offering
May 2022 PIPE Warrants | Private Placement
Stockholders Equity Details [Line Items]
Proceeds from PIPE financings							$ 30,000
Net related cost							27,396
Reduction to additional paid in capital							2,604
Proceeds from issuance of private placement in additional paid in capital, net							$ 7,651
Exercise price							$ 8.25
Warrants and rights outstanding, expire date							May 20, 2027
Term (years)							5 years
Warrants and rights issued closing date							May 20, 2022
Fair value of the warrant liability							$ 19,745
Additional warrant liability				$ 1,389
May 2022 PIPE Warrants (Modified)
Stockholders Equity Details [Line Items]
Class of warrant or right, outstanding		4,054,055							4,054,055	4,054,055	4,054,055
Exercise price										$ 0.35	$ 0.35
Warrants and rights outstanding, expire date										Oct. 10, 2028	Oct. 10, 2028
April 2023 Registered Direct Warrants (Modified)
Stockholders Equity Details [Line Items]
Class of warrant or right, outstanding		4,874,517							4,874,517	4,874,517	4,874,517
Exercise price										$ 0.35	$ 0.35
Warrants and rights outstanding, expire date										Oct. 10, 2028	Oct. 10, 2028
March 2023 PIPE Warrants
Stockholders Equity Details [Line Items]
Class of warrant or right, outstanding										2,084,854	2,084,854
Proceeds from PIPE financings					$ 9,000
Exercise price										$ 3	$ 3
Reduced exercise price	$ 1
Warrants and rights outstanding, expire date										Mar. 27, 2028	Mar. 27, 2028
Term (years)										5 years	5 years
Premium paid for private placement purchase					$ 1,650
Adjusted advance notice period					61 days
May 2023 PIPE Warrants
Stockholders Equity Details [Line Items]
Class of warrant or right, outstanding										5,813,945	5,813,945
Proceeds from PIPE financings			$ 3,750
Exercise price			$ 1							$ 1.00	$ 1.00
Warrants and rights outstanding, expire date			May 18, 2028							May 17, 2028	May 17, 2028
Term (years)			5 years
Adjusted advance notice period			61 days
At the Market Sales Agreement
Stockholders Equity Details [Line Items]
Sales agents commission rate											3.00%
Net proceeds from sale of common stock											$ 136
Gross proceeds from sale of common stock											$ 141
Legacy Celularity
Stockholders Equity Details [Line Items]
Warrants to purchase aggregate shares								13,281,386
Number of shares issued								13,281,386
Issuance cost of equity								$ 15,985
Minimum
Stockholders Equity Details [Line Items]
Exercise price		$ 0.35							$ 0.35
Minimum | Legacy Celularity
Stockholders Equity Details [Line Items]
Exercise price								$ 3.50
Minimum | Legacy Celularity | Preferred Stock
Stockholders Equity Details [Line Items]
Percentage of shares required for voting											50.00%
Maximum
Stockholders Equity Details [Line Items]
Exercise price		$ 0.75							$ 0.75
Maximum | Legacy Celularity
Stockholders Equity Details [Line Items]
Exercise price								$ 7.53
Class A Common Stock
Stockholders Equity Details [Line Items]
Common stock, shares authorized										730,000,000	730,000,000			730,000,000
Common stock, par value (in Dollars per share)										$ 0.0001	$ 0.0001			$ 0.0001
Class of warrant or right, outstanding										70,706,345	70,706,345
Warrants to purchase aggregate shares		8,571,429		9,230,770					8,571,429
Purchase and sale of shares		8,571,429		9,230,770
Class A Common Stock | May 2022 PIPE Warrants
Stockholders Equity Details [Line Items]
Purchase price of per share							$ 7.4
Class A Common Stock | May 2022 PIPE Warrants | Private Placement
Stockholders Equity Details [Line Items]
Warrants to purchase aggregate shares							4,054,055
Purchase price of per share							$ 7.4
Purchase and sale of shares							4,054,055
Class A Common Stock | May 2022 PIPE Warrants (Modified)
Stockholders Equity Details [Line Items]
Warrants to purchase aggregate shares		8,928,572							8,928,572
Class A Common Stock | March 2023 PIPE Warrants
Stockholders Equity Details [Line Items]
Warrants to purchase aggregate shares	7,296,987
Purchase price of per share	$ 3				$ 0.8343
Purchase and sale of shares					9,381,841
Class A Common Stock | March 2023 PIPE Warrants | Private Placement
Stockholders Equity Details [Line Items]
Purchase price of per share					$ 0.125
Class A Common Stock | May 2023 PIPE Warrants
Stockholders Equity Details [Line Items]
Purchase price of per share			$ 0.52
Purchase and sale of shares			5,813,945
Class A Common Stock | May 2023 PIPE Warrants | Private Placement
Stockholders Equity Details [Line Items]
Purchase price of per share			$ 0.125
Class A Common Stock | Legacy Celularity
Stockholders Equity Details [Line Items]
Proceeds from the exercise of warrants								$ 46,485
Class A Common Stock | Maximum | March 2023 PIPE Warrants | Private Placement
Stockholders Equity Details [Line Items]
Warrants to purchase aggregate shares					9,381,841
Class A Common Stock | Maximum | May 2023 PIPE Warrants | Private Placement
Stockholders Equity Details [Line Items]
Warrants to purchase aggregate shares			5,813,945
Common Stock | At the Market Sales Agreement
Stockholders Equity Details [Line Items]
Aggregate offering price						$ 150,000
Purchase and sale of shares											132,958
Average price per share										$ 1.06	$ 1.06
Dr. Hariri | March 2023 PIPE Warrants | Private Placement
Stockholders Equity Details [Line Items]
Proceeds from PIPE financings					$ 2,000