Schedule of Goodwill and Intangible Assets, Net (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Goodwill [1] $ 10,672 $ 10,672
Total intangible assets 66,143 66,143
Accumulated amortization [2] (19,321) (19,111)
Intangible assets, net 46,822 47,032
IPR&D - OPC1 [Member]    
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets [3] 31,700 31,700
IPR&D - VAC2 [Member]    
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets [3] 14,840 14,840
Patents [Member]    
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets 18,953 18,953
Royalty Contracts [Member]    
Finite-Lived Intangible Assets [Line Items]    
Total intangible assets [4] $ 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.
[2] As of December 31, 2021 the acquired patents were fully amortized and the acquired royalty contracts had a remaining unamortized balance of $282,000.
[3] Asterias had two IPR&D intangible assets that were valued at $46.5 million as part of the purchase price allocation that was performed in connection with the Asterias Merger. The fair value of these assets consisted of $31.7 million pertaining to the OPC1 program and $14.8 million pertaining to the VAC2 program.
[4] Asterias had royalty cash flows under certain specific patent families that Asterias previously acquired from Geron Corporation (“Geron”). The Geron patents are expected to continue to generate revenue and are not used in the OPC1 or the VAC platform, these patents are considered to be separate long-lived intangible assets under ASC 805.