Business Segment, Geographic and Major Customer Information (Tables)

12 Months Ended

Dec. 31, 2017

Segment Reporting [Abstract]

Financial information regarding reportable segments

Summarized financial information of the reportable segments is as follows (in thousands):

As of and for the year ended December 31,	Energy Chemistry Technologies		Consumer and Industrial Chemistry Technologies		Corporate and Other			Total
2017
Net revenue from external customers	$	243,106	$	73,992	$	—		$	317,098
Income (loss) from operations	33,611		7,465		(43,931		)	(2,855		)
Depreciation and amortization	7,323		2,391		2,445			12,159
Capital expenditures	3,279		4,763		918			8,960
2016
Net revenue from external customers	$	188,233	$	74,599	$	—		$	262,832
Income (loss) from operations	29,014		9,664		(45,982		)	(7,304		)
Depreciation and amortization	5,935		2,257		2,237			10,429
Capital expenditures	10,674		888		2,398			13,960
2015
Net revenue from external customers	$	213,592	$	56,374	$	—		$	269,966
Income (loss) from operations	43,902		8,742		(40,366		)	12,278
Depreciation and amortization	4,791		2,202		1,742			8,735
Capital expenditures	12,803		568		3,020			16,391

Assets of the Company by reportable segments are as follows (in thousands):

	December 31, 2017		December 31, 2016
Energy Chemistry Technologies	$	177,797	$	184,328
Consumer and Industrial Chemistry Technologies	116,600		98,105
Corporate and Other	35,491		56,882
Total segments	329,888		339,315
Held for sale	—		43,900
Total assets	$	329,888	$	383,215

Revenue by geographic location

Revenue by country is based on the location where services are provided and products are used. No individual country other than the United States (“U.S.”) accounted for more than 10% of revenue. Revenue by geographic location is as follows (in thousands):

	Year ended December 31,
	2017		2016		2015
U.S.	$	259,610	$	210,890	$	227,117
Other countries	57,488		51,942		42,849
Total	$	317,098	$	262,832	$	269,966

Revenue by major customers

Revenue from major customers, as a percentage of consolidated revenue, is as follows:

	Year ended December 31,
	2017	2016	2015
Customer A	12.8%	15.7%	17.2%
Customer B	8.9%	13.2%	14.6%
Customer C	4.0%	6.9%	10.6%