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Segment Reporting (Tables)
9 Months Ended
Sep. 30, 2012
Schedule of Segment Reporting Information, by Segment [Table Text Block]
               

 

 Three Months Ended

 September 30,

 

 Nine Months Ended

 September 30,

 

 2012 

 

 2011

 

 2012

 

 2011

Revenues

             

Heavy Duty Diesel Systems

$   8,680

 

$  11,076

 

$ 32,283

 

$ 30,105

Catalyst

6,659

 

6,447

 

19,194

 

15,002

Corporate

 

 

 

Eliminations (1)

(939)

 

(2,549)

 

(3,354)

 

(4,817)

Total

$ 14,400

 

$ 14,974

 

$ 48,123

 

$ 40,290

Income (loss) from operations

             

Heavy Duty Diesel Systems

$   (272)       

 

$    373

 

$      (545)

 

$     84  

Catalyst

261

 

(170)

 

(750)

 

(1,064)

Corporate

(1,209)

 

(1,381)

 

(4,251)

 

(5,509)

Eliminations (1)

64

 

(72)

 

86

 

(180)

Total

$ (1,156)

 

$ (1,250)

 

$   (5,460)

 

$  (6,669)

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

 

 Three Months Ended

  September 30,

 

 Nine Months Ended

  September 30,

 

 2012

 

 2011

 

 2012

 

 2011

United States

$   7,145

 

$   5,596

 

$  20,675

 

$   15,331

Canada

5,461

 

6,049

 

16,966

 

17,363

United Kingdom

500

 

1,613

 

5,919

 

2,075

Sweden

1,294

 

1,716

 

4,563

 

5,521

Total

$14,400

 

$ 14,974

 

$ 48,123

 

$ 40,290