Summary of Significant Accounting Policies (Details)	1 Months Ended		3 Months Ended		12 Months Ended	16 Months Ended	27 Months Ended
	Sep. 30, 2015 USD ($)	Apr. 30, 2015 USD ($)	Mar. 31, 2017 USD ($) renewable_identification_number customer	Mar. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 02, 2016 USD ($)
Business Acquisition [Line Items]
Biomass-based diesel government incentives			$ 16,941,000	$ 58,401,000
Accounts receivable, net			58,631,000		$ 164,949,000	$ 164,949,000	$ 58,631,000
Estimated impaired fixed assets	$ 1,414,000	$ 11,027,000
Insurance recoveries					19,037,000	2,939,000
Proceeds from business interruption insurance					15,060,000
Change in fair value of convertible debt conversion liability			$ 172,000	$ 0
Customer A
Business Acquisition [Line Items]
Number of customers | customer			1
In-process research and development
Business Acquisition [Line Items]
Useful life			15 years
2036 Convertible Notes | Convertible Notes
Business Acquisition [Line Items]
Face amount								$ 152,000,000	$ 152,000,000
Interest rate								4.00%	4.00%
Minimum
Business Acquisition [Line Items]
RINs per gallon | renewable_identification_number			1.5
Allowed RINs per gallon | renewable_identification_number			0
Maximum
Business Acquisition [Line Items]
RINs per gallon | renewable_identification_number			1.7
Allowed RINs per gallon | renewable_identification_number			2.5
Biodiesel Mixture Excise Tax Credit
Business Acquisition [Line Items]
Biomass-based diesel government incentives			$ 16,660,000				79,101,000
Accounts receivable, net			$ 10,165,000		$ 89,266,000	$ 89,266,000	$ 10,165,000