Business Segment, Geographic and Major Customer Information - Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Summarized financial information regarding reportable segments
Net revenue from external customers	$ 19,416	$ 43,256
Loss from operations	(70,085)	(13,635)
Depreciation and amortization	2,191	2,260
Capital expenditures	42	461
Operating Segments \| Energy Chemistry Technologies
Summarized financial information regarding reportable segments
Net revenue from external customers	19,416	43,256
Loss from operations	(70,269)	(4,703)
Depreciation and amortization	1,809	1,785
Capital expenditures	42	461
Corporate and Other
Summarized financial information regarding reportable segments
Net revenue from external customers	0	0
Loss from operations	184	(8,932)
Depreciation and amortization	382	475
Capital expenditures	$ 0	$ 0

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Section 50
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