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Basis of Presentation and Summary of Significant Accounting Policies (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Subsidiary, Sale of Stock [Line Items]    
Impairment charge on goodwill and intangible asset  
Impairment charge for long-lived assets  
Marketable equity securities, fair market value $ 887 $ 675
Lineage Cell Therapeutics, Inc [Member]    
Subsidiary, Sale of Stock [Line Items]    
Shares held as available-for-sale securities, shares 353,264 353,264
Marketable equity securities, fair market value $ 887 $ 675
Pharma Services [Member]    
Subsidiary, Sale of Stock [Line Items]    
Accounts receivable 300  
Medicare for DetermaRx and Medicare Advantage for DetermaRx [Member]    
Subsidiary, Sale of Stock [Line Items]    
Accounts receivable $ 400