Quarterly report pursuant to Section 13 or 15(d)

Inventory (Details)

v3.7.0.1
Inventory (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Inventory    
Inventory, Net, Total $ 5,761 $ 4,109
In Process Inventory [Member]    
Inventory    
Inventory, Net, Total 712 897
Plant Inventory [Member]    
Inventory    
Inventory, Net, Total 670 461
Conversion Facility Inventory [Member]    
Inventory    
Inventory, Net, Total $ 4,379 $ 2,751