Quarterly report pursuant to Section 13 or 15(d)

3. Inventories - Schedule of Inventories (Details)

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3. Inventories - Schedule of Inventories (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Inventory Disclosure [Abstract]    
Finished goods $ 35,543 $ 31,153
LCFS credits 12,830 6,957
Raw materials 8,678 9,891
Work in progress 7,235 11,121
Other 1,642 1,698
Total $ 65,928 $ 60,820