Schedule of Goodwill and Intangible Assets, Net (Details) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Goodwill	[1]	$ 10,672	$ 10,672
Total intangible assets		66,143	66,143
Accumulated amortization		(19,111)	(17,895)
Intangible assets, net		47,032	48,248
IPR&D – OPC1 [Member]
Total intangible assets	[2]	31,700	31,700
IPR&D – VAC2 [Member]
Total intangible assets	[2]	14,840	14,840
Patents [Member]
Total intangible assets		18,953	18,953
Royalty Contracts [Member]
Total intangible assets	[2]	$ 650	$ 650

[1] Goodwill represents the excess of the purchase price over the fair value of the net tangible and identifiable intangible assets acquired and liabilities assumed in the Asterias Merger (see Note 3).

[2] See Note 3 for information on the Asterias Merger which was consummated on March 8, 2019.