Business Segment and Geographic Disclosures (Tables)

3 Months Ended

Mar. 31, 2015

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 March 31, 2015	Air Pollution Control Segment			FUEL CHEM Segment			Other			Total
Revenues from external customers	$	6,857		$	8,246		$	—		$	15,103
Cost of sales	(4,321		)	(4,116		)	—			(8,437		)
Gross margin	2,536			4,130			—			6,666
Selling, general and administrative	—			—			(8,203		)	(8,203		)
Research and development	—			—			(872		)	(872		)
Operating income (loss)	$	2,536		$	4,130		$	(9,075	)	$	(2,409	)

Three months ended March 31, 2014	Air Pollution Control Segment			FUEL CHEM Segment			Other			Total
Revenues from external customers	$	10,734		$	7,927		$	—		$	18,661
Cost of sales	(7,030		)	(3,780		)	—			(10,810		)
Gross margin	3,704			4,147			—			7,851
Selling, general and administrative	—			—			(8,744		)	(8,744		)
Research and development	—			—			(244		)	(244		)
Operating income (loss)	$	3,704		$	4,147		$	(8,988	)	$	(1,137	)

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   March 31,
	2015		2014
Revenues:
United States	$	12,575	$	9,229
Foreign	2,528		9,432
	$	15,103	$	18,661

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

	March 31, 2015		December 31, 2014
Assets:
United States	$	59,176	$	64,324
Foreign	27,287		27,147
	$	86,463	$	91,471