Quarterly report pursuant to Section 13 or 15(d)

Inventory (Details)

v3.10.0.1
Inventory (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Inventory    
Inventory, Net, Total   $ 4,515
Inventory, Noncurrent $ 9,804  
Reduction in inventory valuation 98  
In Process Inventory [Member]    
Inventory    
Inventory, Net, Total   315
Inventory, Noncurrent 518  
Plant Inventory [Member]    
Inventory    
Inventory, Net, Total   369
Inventory, Noncurrent 548  
Conversion Facility Inventory [Member]    
Inventory    
Inventory, Net, Total   $ 3,831
Inventory, Noncurrent $ 8,738