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Discontinued Operations - Summary of Business Consideration to Calculation of the Loss on Sale (Details) - USD ($) $ in Thousands		12 Months Ended
	Apr. 25, 2019	Dec. 31, 2019	Dec. 31, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net cash proceeds		$ 5,637	$ 0
Net loss on sale of business		$ (6,508)	$ (36)
Discontinued Operations Disposed of By Sale [Member] | Cell Therapy Business [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Consideration received	$ 7,000
Transaction costs	(1,363)
Net cash proceeds	5,637
Carrying value of business and assets sold	12,145
Net loss on sale of business	$ (6,508)

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