Annual report pursuant to Section 13 and 15(d)

Related Party Transactions - (Details Textual)

v3.7.0.1
Related Party Transactions - (Details Textual) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Related Party Transaction [Line Items]      
Biomass-based diesel—related parties $ 0 $ 4,542 $ 42,622
Landus Cooperative      
Related Party Transaction [Line Items]      
Biomass-based diesel—related parties   $ 4,542 $ 42,622