Business Segment, Geographic and Major Customer Information (Tables)

12 Months Ended

Dec. 31, 2019

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 years ended December 31,	Energy Chemistry Technologies			Corporate and Other			Total
2019
Net revenue from external customers	$	119,353		$	—		$	119,353
Loss from operations	(46,485		)	(30,140		)	(76,625		)
Depreciation and amortization	7,439			1,026			8,465
Capital expenditures	2,411			—			2,411
2018
Net revenue from external customers	$	177,773		$	—		$	177,773
Income (loss) from operations	(36,817		)	(32,994		)	(69,811		)
Depreciation and amortization	7,107			2,109			9,216
Capital expenditures	2,733			826			3,559
2017
Net revenue from external customers	$	243,106		$	—		$	243,106
Income (loss) from operations	33,611			(43,931		)	(10,320		)
Depreciation and amortization	7,323			2,445			9,768
Capital expenditures	3,279			918			4,197

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

	December 31, 2019		December 31, 2018
Energy Chemistry Technologies	$	117,357	$	139,205
Corporate and Other	114,490		28,208
Total segments	231,847		167,413
Held for sale	—		118,470
Total assets	$	231,847	$	285,883

Revenue by geographic location

Revenue by geographic location is as follows (in thousands):

	Years ended December 31,
	2019		2018		2017
U.S.	$	104,786	$	146,421	$	219,517
Other countries	14,567		31,352		23,589
Total	$	119,353	$	177,773	$	243,106

Revenue by major customers

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

	Years ended December 31,
	2019	2018	2017
Customer A	20.4%	*	*
Customer B	10.3%	12.23%	*
Customer C	*	10.1%	*
Customer D	*	*	16.7%