Segment Reporting (Tables)

12 Months Ended

Dec. 31, 2013

Segment Reporting (Tables) [Line Items]

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Years Ended December 31,
	2013	2012
Net sales
Heavy Duty Diesel Systems	$ 32,614	$ 40,666
Catalyst	25,823	24,322
Corporate	─	─
Eliminations (1)	(3,153)	(4,451)
Total	$ 55,284	$ 60,537
Income (loss) from operations
Heavy Duty Diesel Systems	$ 1,018	$ (602)
Catalyst	1,026	(1,816)
Corporate	(6,476)	(5,469)
Eliminations	166	50
Total	$ (4,266)	$ (7,837)
Depreciation and amortization
Heavy Duty Diesel Systems	$ 1,082	$ 1,238
Catalyst	204	192
Corporate	─	─
Total	$ 1,286	$ 1,430
Capital expenditures
Heavy Duty Diesel Systems	$ 48	$ 135
Catalyst	94	101
Corporate	─	─
Total	$ 142	$ 236

	December 31,
Total assets	2013	2012
Heavy Duty Diesel Systems	$ 42,181	$ 40,182
Catalyst	41,687	37,637
Discontinued operations	1,132	1,172
Eliminations	(56,631)	(43,550)
Total	$ 28,369	$ 35,441

Sales Revenue, Segment [Member]

Segment Reporting (Tables) [Line Items]

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

	Years Ended December 31,
	2013	2012
United States	$ 26,659	$ 25,895
Canada	23,913	22,152
United Kingdom	951	6,691
Sweden	3,761	5,799
Total	$ 55,284	$ 60,537

Assets, Total [Member]

Segment Reporting (Tables) [Line Items]

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

	Fixed Assets		Total Assets
	2013	2012	2013	2012
United States	$ 609	$ 616	$ 12,371	$ 15,353
Canada	803	1,278	12,874	15,681
United Kingdom	─	─	741	1,392
Sweden	47	106	2,383	3,015
Total	$ 1,459	$ 2,000	$ 28,369	$ 35,441