8.	Segment Information

The Company has two operating segments: 1) oilfield technologies and services and 2) environmental products and services. Discrete financial information is available for each operating segment. Management of each operating segment reports to our Chief Executive Officer, the Company’s chief operating decision maker, who regularly evaluates income before income taxes as the measure to evaluate segment performance and to allocate resources. The accounting policies of each segment are the same as those described in the summary of significant accounting policies in Note 1 of the consolidated financial statements included in the annual report on Form 10-K for the year ended December 31, 2017.

The Company’s oilfield technologies and services segment manufactures and sells technology ceramic, base ceramic, and frac sand proppants for use primarily in the hydraulic fracturing of natural gas and oil wells. All of the Company’s ceramic proppant products have similar production processes and economic characteristics and are marketed predominantly to pressure pumping companies that perform hydraulic fracturing for major oil and gas companies. The Company’s manufacturing facilities also produce ceramic media for use in various industrial technology applications, including but not limited to casting and milling. This segment also promotes increased production and Estimated Ultimate Recovery (“EUR”) of oil and natural gas by providing industry-leading technology to Design, Build, and Optimize the Frac^TM. Through our wholly-owned subsidiary StrataGen, Inc., we sell one of the most widely used fracture stimulation software under the brand FracPro^® and provide fracture design and consulting services to oil and natural gas E&P companies under the brand StrataGen.

Our environmental products and services segment is intended to protect operators’ assets, minimize environmental risks, and lower lease operating expense (“LOE”). AGPI, a wholly-owned subsidiary of ours, provides spill prevention, containment and countermeasure systems for the oil and gas industry. AGPI uses proprietary technology designed to enable its clients to extend the life of their storage assets, reduce the potential for hydrocarbon spills and provide containment of stored materials.

Summarized financial information for the Company’s operating segments for the three months ended March 31, 2018 and 2017 is shown in the following tables. Intersegment sales are not material.

	Oilfield Technologies and Services			Environmental Products and Services			Total
	($ in thousands)
Three Months Ended March 31, 2018
Revenue from external customers	$	42,467		$	6,900		$	49,367
(Loss) income before income taxes		(22,767	)		495			(22,272	)
Depreciation and amortization		8,905			289			9,194
Three Months Ended March 31, 2017
Revenue from external customers	$	29,620		$	5,050		$	34,670
Loss before income taxes		(31,763	)		(393	)		(32,156	)
Depreciation and amortization		12,094			336			12,430