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Property, Plant, and Equipment and Other Assets (Details Narrative) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]          
Depreciation expense $ 169 $ 244 $ 548 $ 902  
Gain (loss) on disposition of property plant equipment 254 $ (123) 264 $ (381)  
Security deposit 3   3   $ 123
Office Lease [Member]          
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]          
Security deposit $ 120   120    
Electrical Contract [Member]          
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]          
Payments for deposit     $ 120