Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended					6 Months Ended	12 Months Ended
	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Sep. 30, 2020 Segment	Jun. 30, 2020 Segment	Dec. 31, 2023 USD ($) Segment	Dec. 31, 2022 USD ($) Segment
Summary Of Significant Accounting Policies [Line Items]
Restricted cash				$ 14,836,000			$ 9,936,000	$ 14,836,000
IPR&D impairment							$ 107,800,000	0
Number of operating segment | Segment					3	1	3
Advertising and Marketing Costs							$ 44,000	163,000
Reduction of research and development expense resulting from grant							$ 0	$ 0
Expected dividend yield							0.00%
Minimum percentage of recognized tax benefit likelihood of being realized upon ultimate settlement with the tax authority							50.00%
Number of business segments | Segment							3	3
Instrument-specific credit risk income							$ 146,000	$ 20,000
Accumulated other comprehensive income to other income (expense) upon short term debt conversion							155,000	11,000
Right-of-use assets - operating leases				13,060,000			10,990,000	13,060,000
Operating lease liability							26,177,000
Accumulated deficit				(645,496,000)			$ (841,791,000)	(645,496,000)
Change in accounting principle, accounting standards update, adoption date							Jan. 01, 2023
Change in accounting principle, accounting standards update, adopted							true
Change in Accounting Principle, Accounting Standards Update, Immaterial Effect [true false]							true
Accounting Standards Update [Extensible Enumeration]							us-gaap:AccountingStandardsUpdate201613Member
Payment plans for customer to pay over time period							24 months
Goodwill impairment	$ 82,714,000	$ 0	$ 29,633,000	3,610,000			$ 112,347,000	3,610,000
Reserves				1,789,000			5,837,000	1,789,000
Biovance 3L
Summary Of Significant Accounting Policies [Line Items]
Reserves				0			3,270,000	0
Cell Therapy
Summary Of Significant Accounting Policies [Line Items]
Goodwill impairment							$ 112,347,000
Degenerative Disease
Summary Of Significant Accounting Policies [Line Items]
Goodwill impairment								3,610,000
Maximum
Summary Of Significant Accounting Policies [Line Items]
Contracted storage periods							25 years
Payment plans for customer to pay over time period							24 months
Minimum
Summary Of Significant Accounting Policies [Line Items]
Contracted storage periods							18 years
Payment plans for customer to pay over time period							1 year
One Customer
Summary Of Significant Accounting Policies [Line Items]
Reserve for accounts receivable				$ 1,762,000			$ 2,349,000	$ 1,762,000
Customer Concentration Risk | One Customer | Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage							23.00%
Customer Concentration Risk | One Customer | Revenue
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage							14.00%
Customer Concentration Risk | Customer A | Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage							18.00%	38.00%
Customer Concentration Risk | Customer A | Revenue
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage								11.00%
Customer Concentration Risk | Two Customer | Accounts Receivable
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage								33.00%
Customer Concentration Risk | Two Customer | Revenue
Summary Of Significant Accounting Policies [Line Items]
Concentration Risk, Percentage							13.00%	37.00%