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, 2017
Dec. 31, 2016
Inventory Disclosure [Abstract]    
Finished goods $ 38,144 $ 33,773
Work in progress 8,239 7,092
Raw materials 7,752 6,571
LCFS credits 7,300 10,926
Other 1,652 1,708
Total $ 63,087 $ 60,070