Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Components of Intangible assets

Intangible assets consist of the following:

	March 31, 2016
	Cost		Accumulated Amortization			Net		Weighted Average Remaining Life
Raw material supply agreement	$	6,230	$	(1,653	)	$	4,577	9.8 years
Renewable hydrocarbon diesel technology	8,300		(1,014		)	7,286		13.3 years
Ground lease	200		(116		)	84		5.6 years
Acquired customer relationships	2,900		(179		)	2,721		9.3 years
Total amortizing intangibles	17,630		(2,962		)	14,668
In-process research and development, indefinite lives	15,956		—			15,956
Total intangible assets	$	33,586	$	(2,962	)	$	30,624

	December 31, 2015
	Cost		Accumulated Amortization			Net		Weighted Average Remaining Life
Raw material supply agreement	$	6,230	$	(1,551	)	$	4,679	10.0 years
Renewable hydrocarbon diesel technology	8,300		(876		)	7,424		13.5 years
Ground lease	200		(112		)	88		5.9 years
Acquired customer relationships	2,900		(106		)	2,794		9.6 years
Total amortizing intangibles	17,630		(2,645		)	14,985
In-process research and development, indefinite lives	15,956		—			15,956
Total intangible assets	$	33,586	$	(2,645	)	$	30,941

Estimated amortization expense

The estimated intangible asset amortization expense for the remainder of fiscal year 2016 through fiscal year 2022 and thereafter is as follows:

April 1, 2016 through December 31, 2016	$	972
2017	1,302
2018	1,309
2019	1,315
2020	1,322
2021	1,328
2022 and thereafter	7,120
Total	$	14,668