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Nature of Business - Additional Information (Details)								1 Months Ended	3 Months Ended	12 Months Ended
Nature of Business - Additional Information (Details)	Mar. 24, 2023 USD ($)	Mar. 14, 2023 Days $ / shares	Feb. 22, 2023 USD ($)	Oct. 05, 2018 USD ($)	May 07, 2018 USD ($)	Aug. 15, 2017 USD ($)	May 31, 2017 USD ($)	Aug. 31, 2017 USD ($) shares	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) ft² ClinicalTrial	Dec. 31, 2021 USD ($)
Description Of Organization And Business Operations Details [Line Items]
Date of incorporation										Aug. 24, 2018
Number of clinical trials \| ClinicalTrial										3
Area of building \| ft²										147,215
Debt assumed					$ 0
Net operating loss										$ (25,600,000)	$ (109,059,000)
Net cash used in operating activities										(137,876,000)	(110,096,000)
Accumulated deficit										645,496,000	$ 663,681,000
Unrestricted cash and cash equivalents										8,600,000
Debt principal balance										37,603,000
Subsequent Event
Description Of Organization And Business Operations Details [Line Items]
Percentage of reduction in workforce									33.00%
Subsequent Event \| Class A Common Stock
Description Of Organization And Business Operations Details [Line Items]
Closing bid price per share of common stock \| $ / shares		$ 1.00
Consecutive business days \| Days		30
Minimum bid price requirement compliance period		180 days
Pre Paid Advance Agreement \| Yorkville
Description Of Organization And Business Operations Details [Line Items]
Debt principal balance									$ 32,600,000	$ 37,000,000
Pre Paid Advance Agreement \| Yorkville \| Subsequent Event
Description Of Organization And Business Operations Details [Line Items]
Amount of monthly repayment			$ 6,000,000
Percentage of premium principal amount			5.00%
Debt instrument payment	$ 1,950,000
Debt instrument remaining amount repayment									$ 11,000,000
HLI Cellular Therapeutics,LLC
Description Of Organization And Business Operations Details [Line Items]
Fair value of consideration							$ 28,876,000
Anthrogenesis
Description Of Organization And Business Operations Details [Line Items]
Fair value of consideration						$ 346,430,000
Contingent value right issued for each share \| shares								1
Regulatory milestones								$ 50,000
Commercial milestone payments								$ 125,000
Alliqua APA
Description Of Organization And Business Operations Details [Line Items]
Cash consideration paid					$ 29,000
Caricord
Description Of Organization And Business Operations Details [Line Items]
Fair value of consideration				$ 9,326