Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Components of Intangible assets

Intangible assets consist of the following:

	June 30, 2016
	Cost		Accumulated Amortization			Net		Weighted Average Remaining Life
Raw material supply agreement	$	6,230	$	(1,762	)	$	4,468	9.5 years
Renewable hydrocarbon diesel technology	8,300		(1,153		)	7,147		13.0 years
Ground lease	200		(119		)	81		5.3 years
Acquired customer relationships	2,900		(251		)	2,649		9.1 years
Total amortizing intangibles	17,630		(3,285		)	14,345
In-process research and development, indefinite lives	15,956		—			15,956
Total intangible assets	$	33,586	$	(3,285	)	$	30,301

	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:

July 1, 2016 through December 31, 2016	$	648
2017	1,302
2018	1,309
2019	1,315
2020	1,322
2021	1,328
2022 and thereafter	7,121
Total	$	14,345