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Other Liabilities (Details) - USD ($)
$ in Thousands
Jun. 26, 2019
Sep. 30, 2019
Dec. 31, 2018
Other Current Liabilities      
Deferred liability   $ 1,500  
Other long-term liabilities (Note 13)   384 $ 10
Sale of Equipment      
Other Current Liabilities      
Deferred liability   1,500  
Agreement      
Other Current Liabilities      
Deferred liability $ 1,500    
Effective interest rate (as a percent) 3.00%    
Percentage of compensation to be paid on anticipated cash flow 60.00%    
Investment Interest Rate 11.00%    
Sale of Equipment | Zacatecas      
Other Current Liabilities      
Lease liability for office space   $ 100