Basis of Presentation and Nature of the Business (Details) gal in Millions	6 Months Ended
	Jun. 30, 2018 facility gal
Class of Stock [Line Items]
Number of biorefineries	14
Number of operating biomass-based diesel production facilities	13
Production capacity per year | gal	520
Number of fermentation facilities	1
Number of feedstock processing facilities	1
Number of multi-feedstock capable plants	10
North America
Class of Stock [Line Items]
Number of biorefineries	12
Europe
Class of Stock [Line Items]
Number of biorefineries	2