Discontinued Operations - Schedule of Assets and Liabilities of Discontinued Operations on Company's Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current assets of discontinued operations
Total current assets of discontinued operations		$ 1,556
Noncurrent assets of discontinued operations
Total noncurrent assets of discontinued operations		12,346
Current liabilities of discontinued operations
Total current liabilities of discontinued operations	$ 2,513	3,465
Noncurrent liabilities of discontinued operations
Total noncurrent liabilities of discontinued operations	128	1,717
Cell Therapy Operations
Current assets of discontinued operations
Prepaid expenses		1,527
Other current assets		29
Total current assets of discontinued operations		1,556
Noncurrent assets of discontinued operations
Property, equipment, and software - net		8,375
Intangible assets-net		617
Right-of-use assets-net		1,010
Other assets		2,344
Total noncurrent assets of discontinued operations		12,346
Total assets of discontinued operations		13,902
Current liabilities of discontinued operations
Accounts payable	158	572
Accrued compensation		1,155
Accrued research and development expenses	2,355	1,379
Lease liabilities		359
Total current liabilities of discontinued operations	2,513	3,465
Noncurrent liabilities of discontinued operations
Lease liabilities		1,717
Total noncurrent liabilities of discontinued operations		1,717
Total liabilities of discontinued operations	$ 2,513	$ 5,182