Consolidated Statements of Operations - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
REVENUES:
Biomass-based diesel sales		$ 1,141,281	$ 1,052,772	$ 1,207,618
Biomass-based diesel government incentives		245,868	220,634	290,393
Total biodiesel sales		1,387,149	1,273,406	1,498,011
Services		195	425	127
Total revenue		1,387,344	1,273,831	1,498,138
COSTS OF GOODS SOLD:
Biomass-based diesel		1,272,125	1,070,430	1,209,191
Biomass-based diesel—related parties	[1]	4,542	42,622	49,358
Services		134	167	156
Total cost of goods sold		1,276,801	1,113,219	1,258,705
GROSS PROFIT		110,543	160,612	239,433
SELLING, GENERAL, AND ADMINISTRATIVE EXPENSES (includes related party amounts of $0, $45, and $37, respectively)		73,397	62,681	45,865
RESEARCH AND DEVELOPMENT EXPENSE		16,851	12,424	258
IMPAIRMENT OF GOODWILL		175,028	0	0
INCOME (LOSS) FROM OPERATIONS		(154,733)	85,507	193,310
OTHER INCOME (EXPENSE), NET:
Change in fair value of contingent consideration		359	6,631	0
Other income		5,830	662	388
Interest expense (includes related party amounts of $0, $7, and $30, respectively)		(11,867)	(6,690)	(2,397)
Total other income (expenses)		(5,678)	603	(2,009)
INCOME (LOSS) BEFORE INCOME TAXES		(160,411)	86,110	191,301
INCOME TAX BENEFIT (EXPENSE)		8,701	(3,572)	(4,935)
NET INCOME (LOSS)		(151,710)	82,538	186,366
LESS—NET LOSS ATTRIBUTABLE TO NONCONTROLLING INTEREST		(318)	(73)	0
NET INCOME (LOSS) ATTRIBUTABLE TO THE COMPANY		(151,392)	82,611	186,366
PLUS—GAIN ON REDEMPTION OF PREFERRED STOCK		0	378	0
LESS—EFFECT OF CHANGES TO PREFERRED STOCK		0	(40)	(2,055)
LESS—EFFECT OF PARTICIPATING PREFERRED STOCK		0	(91)	(16,272)
LESS—EFFECT OF PARTICIPATING SHARE-BASED AWARDS		0	(1,238)	(2,785)
NET INCOME (LOSS) ATTRIBUTABLE TO THE COMPANY’S COMMON STOCKHOLDERS		$ (151,392)	$ 81,620	$ 165,254
Net income (loss) per share attributable to common stockholders:
Basic (in dollars per share)		$ (3.44)	$ 2.00	$ 5.00
Diluted (in dollars per share)		$ (3.44)	$ 1.99	$ 5.00
Weighted-average shares used to compute net income (loss) per share attributable to common stockholders:
Basic (in shares)		43,958,803	40,740,411	33,045,164
Diluted (in shares)		43,958,803	40,749,913	33,052,879

[1] Represents transactions with West Central prior to the Company's determination that West Central was no longer a related party.