Business Segment, Geographic and Major Customer Information - Reportable Segments (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2017	Mar. 31, 2016
Summarized financial information regarding reportable segments
Net revenue from external customers	$ 79,954	$ 63,812
Gross profit	27,742	23,794
Income (loss) from operations	(623)	368
Depreciation and amortization	3,032	2,250
Capital expenditures	1,877	3,790
Operating Segments \| Energy Chemistry Technologies
Summarized financial information regarding reportable segments
Net revenue from external customers	60,765	44,679
Gross profit	22,302	18,769
Income (loss) from operations	8,548	8,013
Depreciation and amortization	1,849	1,244
Capital expenditures	514	3,014
Operating Segments \| Consumer and Industrial Chemistry Technologies
Summarized financial information regarding reportable segments
Net revenue from external customers	19,189	19,133
Gross profit	5,440	5,025
Income (loss) from operations	3,705	3,389
Depreciation and amortization	579	510
Capital expenditures	500	143
Corporate and Other
Summarized financial information regarding reportable segments
Net revenue from external customers	0	0
Gross profit	0	0
Income (loss) from operations	(12,876)	(11,034)
Depreciation and amortization	604	496
Capital expenditures	$ 863	$ 633

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/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1,2)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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The net result for the period of deducting operating expenses from operating revenues.

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Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 225
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-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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