Business Segment, Geographic and Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2013

SegmentReportingDisclosureTextBlockAbstract

Schedule of Segment Reporting Information, by Segment

Information about reporting segment net sales and gross margin are provided below:

For the year ended December 31, 2013	Air Pollution  Control Segment			FUEL CHEM Segment			Other			Total
Revenues from external customers	$	72,552		$	36,786		$	—		$	109,338
Cost of sales	(45,138		)	(17,383		)	—			(62,521		)
Gross margin	27,414			19,403			—			46,817
Selling, general and administrative	—			—			(36,375		)	(36,375		)
Research and development	—			—			(2,442		)	(2,442		)
Operating income	$	27,414		$	19,403		$	(38,817	)	$	8,000

For the year ended December 31, 2012	Air Pollution  Control Segment			FUEL CHEM Segment			Other			Total
Revenues from external customers	$	62,441		$	35,203		$	—		$	97,644
Cost of sales	(40,146		)	(16,753		)	—			(56,899		)
Gross margin	22,295			18,450			—			40,745
Selling, general and administrative	—			—			(32,682		)	(32,682		)
Research and development	—			—			(2,863		)	(2,863		)
Operating income	$	22,295		$	18,450		$	(35,545	)	$	5,200

For the year ended December 31, 2011	Air Pollution  Control Segment			FUEL CHEM Segment			Other			Total
Revenues from external customers	$	50,930		$	42,738		$	—		$	93,668
Cost of sales	(28,467		)	(21,390		)	—			(49,857		)
Gross margin	22,463			21,348			—			43,811
Selling, general and administrative	—			—			(33,446		)	(33,446		)
Gain from revaluation of ACT liability	—			—			758			758
Research and development	—			—			(1,474		)	(1,474		)
Operating income	$	22,463		$	21,348		$	(34,162	)	$	9,649

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area

Assets are those directly associated with operations of the geographic area.

For the years ended December 31,	2013		2012		2011
Revenues:
United States	$	63,275	$	70,425	$	76,077
Foreign	46,063		27,219		17,591
	$	109,338	$	97,644	$	93,668

As of December 31,	2013		2012
Assets:
United States	$	83,464	$	86,466
Foreign	26,594		19,431
	$	110,058	$	105,897

Schedule of Quarterly Financial Information

Set forth below are the unaudited quarterly financial data for the fiscal years ended December 31, 2013 and 2012.

For the quarters ended	March 31			June 30		September 30		December 31
2013
Revenues	$	22,484		$	29,092	$	33,555	$	24,207
Cost of sales	13,052			17,227		18,455		13,787
Net (loss) income	(21		)	1,236		3,480		406
Net income per common share:
Basic	$	—		$	0.06	$	0.16	$	0.02
Diluted	$	—		$	0.05	$	0.15	$	0.02
2012
Revenues	$	25,212		$	20,911	$	24,907	$	26,614
Cost of sales	13,220			11,880		14,671		17,128
Net income (loss)	1,543			68		1,194		(29		)
Net income per common share:
Basic	$	0.07		$	—	$	0.05	$	—
Diluted	$	0.06		$	—	$	0.05	$	—