Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2015

Equity Investments

Schedule of financial information by reporting segment

        Summarized financial information for the Company's reportable segments is as follows (in thousands):

	Years Ended December 31,
	2015			2014
Net sales
Catalyst	$	26,224		$	23,772
Heavy Duty Diesel Systems		16,664			19,577
Eliminations(1)		(3,150	)		(2,118	)
Total	$	39,738		$	41,231
Income (loss) from operations
Catalyst	$	(1,612	)	$	(775	)
Heavy Duty Diesel Systems		(1,699	)		183
Corporate		(6,780	)		(6,894	)
Eliminations		(228	)		(139	)
Total	$	(10,319	)	$	(7,625	)
Depreciation and amortization
Catalyst	$	170		$	135
Heavy Duty Diesel Systems		754			872
Total	$	924		$	1,007
Capital expenditures
Catalyst	$	644		$	338
Heavy Duty Diesel Systems		17			116
Total	$	661		$	454

(1)           Elimination of Catalyst revenue related to sales to Heavy Duty Diesel Systems.

	December 31,
	2015			2014
Total assets
Catalyst	$	44,457		$	43,333
Heavy Duty Diesel Systems		43,580			40,552
Eliminations		(62,935	)		(56,228	)
Total	$	25,102		$	27,657

Schedule of net sales and fixed assets and total assets by geographic region

        Net sales by geographic region based on location of sales organization is as follows (in thousands):

	Years Ended December 31,
	2015		2014
United States	$	24,323	$	22,678
Canada		12,143		14,300
Europe		3,272		4,253
Total international		15,415		18,553
Total revenues	$	39,738	$	41,231

        Net fixed assets and total assets by geographic region as of December 31, 2015 and 2014 is as follows (in thousands):

	Fixed Assets				Total Assets
	2015		2014		2015		2014
United States	$	1,247	$	723	$	11,266	$	14,618
Canada		290		632		11,641		10,394
Europe		1		2		2,195		2,645
Total international		291		634		13,836		13,039
Total	$	1,538	$	1,357	$	25,102	$	27,657