Business Segment, Geographic and Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2014

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, 2014	Air Pollution  Control Segment			FUEL CHEM Segment			Other			Total
Revenues from external customers	$	42,031		$	36,986		$	—		$	79,017
Cost of sales	(26,586		)	(17,303		)	—			(43,889		)
Gross margin	15,445			19,683			—			35,128
Selling, general and administrative	—			—			(35,432		)	(35,432		)
Research and development	—			—			(1,459		)	(1,459		)
Goodwill impairment	(23,400		)	—			—			(23,400		)
Operating (loss) income	$	(7,955	)	$	19,683		$	(36,891	)	$	(25,163	)

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

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,	2014		2013		2012
Revenues:
United States	$	50,901	$	63,275	$	70,425
Foreign	28,116		46,063		27,219
	$	79,017	$	109,338	$	97,644

As of December 31,	2014		2013
Assets:
United States	$	64,324	$	83,464
Foreign	27,147		26,594
	$	91,471	$	110,058

Schedule of Quarterly Financial Information

Set forth below are the unaudited quarterly financial data for the fiscal years ended December 31, 2014 and 2013.

For the quarters ended	March 31			June 30			September 30		December 31
2014
Revenues	$	18,661		$	20,190		$	21,482	$	18,684
Cost of sales	10,810			11,677			11,582		9,820
Net (loss) income	(1,086		)	(720		)	1,192		(17,111		)
Net (loss) income per common share:
Basic	$	(0.05	)	$	(0.03	)	$	0.05	$	(0.75	)
Diluted	$	(0.05	)	$	(0.03	)	$	0.05	$	(0.75	)
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 (loss) income per common share:
Basic	$	—		$	0.06		$	0.16	$	0.02
Diluted	$	—		$	0.05		$	0.15	$	0.02