Intangible Assets (Tables)

6 Months Ended

Jun. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Components of Intangible assets

Intangible assets consist of the following:

	June 30, 2018
	Cost		Accumulated Amortization			Net		Weighted Average Remaining Life
Raw material supply agreement	$	6,230	$	(2,630	)	$	3,600	7.5 years
Renewable diesel technology	8,300		(2,259		)	6,041		11.0 years
Ground lease	200		(149		)	51		3.4 years
Acquired customer relationships	2,900		(831		)	2,069		7.1 years
In-process research and development	15,956		(1,773		)	14,183		13.3 years
Total intangible assets	$	33,586	$	(7,642	)	$	25,944

	December 31, 2017
	Cost		Accumulated Amortization			Net		Weighted Average Remaining Life
Raw material supply agreement	$	6,230	$	(2,408	)	$	3,822	8.0 years
Renewable diesel technology	8,300		(1,983		)	6,317		11.5 years
Ground lease	200		(141		)	59		3.9 years
Acquired customer relationships	2,900		(686		)	2,214		7.6 years
In-process research and development	15,956		(1,241		)	14,715		13.8 years
Total intangible assets	$	33,586	$	(6,459	)	$	27,127

Estimated Amortization Expense

The estimated intangible asset amortization expense for the remainder of 2018 through 2023 and thereafter is as follows:

July 1, 2018 through December 31, 2018	$	1,187
2019	2,382
2020	2,389
2021	2,395
2022	2,388
2023	2,395
2024 and thereafter	12,808
Total	$	25,944