Business Segment, Geographic and Major Customer Information - Reportable Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015 segment	Mar. 31, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Number of segments	4us-gaap_NumberOfReportableSegments
Summarized financial information regarding reportable segments
Net revenue from external customers	$ 82,373us-gaap_Revenues	$ 102,575us-gaap_Revenues
Gross margin	26,527us-gaap_GrossProfit	43,681us-gaap_GrossProfit
Income (loss) from operations	(1,289)us-gaap_OperatingIncomeLoss	18,798us-gaap_OperatingIncomeLoss
Depreciation and amortization	4,570	4,219
Total assets	415,007us-gaap_Assets	390,516us-gaap_Assets	423,276us-gaap_Assets
Capital expenditures	5,590	4,990
Energy Chemistry Technologies [Member]
Summarized financial information regarding reportable segments
Net revenue from external customers	46,643	62,377
Gross margin	16,100	29,220
Income (loss) from operations	6,821	21,623
Depreciation and amortization	1,204	1,067
Total assets	152,423	137,638
Capital expenditures	2,361	1,386
Consumer and Industrial Chemistry Technologies [Member]
Summarized financial information regarding reportable segments
Net revenue from external customers	13,463	13,030
Gross margin	3,706	4,033
Income (loss) from operations	2,381	2,335
Depreciation and amortization	552	433
Total assets	92,438	93,217
Capital expenditures	22	14
Drilling Products [Member]
Summarized financial information regarding reportable segments
Net revenue from external customers	18,694	24,901
Gross margin	5,991	9,788
Income (loss) from operations	(637)	3,317
Depreciation and amortization	2,319	2,437
Total assets	141,229	136,141
Capital expenditures	2,124	3,296
Production Technologies [Member]
Summarized financial information regarding reportable segments
Net revenue from external customers	3,573	2,267
Gross margin	730	640
Income (loss) from operations	(539)	(79)
Depreciation and amortization	125	70
Total assets	25,176	14,864
Capital expenditures	638	61
Corporate and Other [Member]
Summarized financial information regarding reportable segments
Net revenue from external customers	0	0
Gross margin	0	0
Income (loss) from operations	(9,315)	(8,398)
Depreciation and amortization	370	212
Total assets	3,741	8,656
Capital expenditures	$ 445	$ 233

Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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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.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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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

-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

-Paragraph 2

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