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Related Party Transactions (Details Narrative) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2017
Related Party Transaction [Line Items]      
Minimum fixed payments due under the shared facilities agreement $ 131    
Common stock outstanding percentage   5.00%  
Liquidated damages owed $ 300    
BioTime, Inc. [Member]      
Related Party Transaction [Line Items]      
Markup rate on allocated costs 5.00%    
Term of payment 30 days    
Interest rate charged on unpaid and overdue invoices 15.00%    
Current Liabilities [Member]      
Related Party Transaction [Line Items]      
Allocated use fees payable $ 2,100   $ 2,100