Business Segment and Geographic Disclosures (Tables)

6 Months Ended

Jun. 30, 2013

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, by Segment

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

Three months ended June 30, 2013	Air Pollution Control Segment			FUEL CHEM Segment			Other			Total
Revenues from external customers	$	20,239		$	8,853		$	—		$	29,092
Cost of sales	(13,083		)	(4,144		)	—			(17,227		)
Gross margin	7,156			4,709			—			11,865
Selling, general and administrative	—			—			(9,307		)	(9,307		)
Research and development	—			—			(430		)	(430		)
Operating income	$	7,156		$	4,709		$	(9,737	)	$	2,128

Three months ended June 30, 2012	Air Pollution Control Segment			FUEL CHEM Segment			Other			Total
Revenues from external customers	$	12,818		$	8,093		$	—		$	20,911
Cost of sales	(7,951		)	(3,929		)	—			(11,880		)
Gross margin	4,867			4,164			—			9,031
Selling, general and administrative	—			—			(7,874		)	(7,874		)
Research and development	—			—			(969		)	(969		)
Operating income	$	4,867		$	4,164		$	(8,843	)	$	188

Six months ended June 30, 2013	Air Pollution Control Segment			FUEL CHEM Segment			Other			Total
Revenues from external customers	$	33,186		$	18,390		$	—		$	51,576
Cost of sales	(21,666		)	(8,613		)	—			(30,279		)
Gross margin	11,520			9,777			—			21,297
Selling, general and administrative	—			—			(17,765		)	(17,765		)
Research and development	—			—			(1,363		)	(1,363		)
Operating income	$	11,520		$	9,777		$	(19,128	)	$	2,169

Six months ended June 30, 2012	Air Pollution Control Segment			FUEL CHEM Segment			Other			Total
Revenues from external customers	$	28,532		$	17,591		$	—		$	46,123
Cost of sales	(16,702		)	(8,398		)	—			(25,100		)
Gross margin	11,830			9,193			—			21,023
Selling, general and administrative	—			—			(16,868		)	(16,868		)
Research and development	—			—			(1,475		)	(1,475		)
Operating income	$	11,830		$	9,193		$	(18,343	)	$	2,680

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

Information concerning Fuel Tech’s operations by geographic area is provided below. Revenues are attributed to countries based on the location of the customer. Assets are those directly associated with operations of the geographic area.

	Three Months Ended   June 30,				Six Months Ended   June 30,
	2013		2012		2013		2012
Revenues:
United States	$	17,244	$	17,966	$	30,110	$	40,910
Foreign	11,848		2,945		21,466		5,213
	$	29,092	$	20,911	$	51,576	$	46,123

Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country

	June 30, 2013		December 31, 2012
Assets:
United States	$	92,860	$	86,466
Foreign	20,212		19,431
	$	113,072	$	105,897