v2.4.0.8

Segment Reporting and Geographic Information (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2014
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information, by Segment [Table Text Block] |
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2014 |  | 2013 |  | 2014 |  | 2013
Revenues |  |  |  |  |  |  |  |  |  |  |
| Heavy Duty Diesel Systems | $ | 3,672 |  | $ | 7,073 |  | $ | 16,047 |  | $ | 19,714
| Catalyst |  | 6,186 |  |  | 7,199 |  |  | 18,286 |  |  | 19,951
| Eliminations (1) |  | (547) |  |  | (963) |  |  | (1,770) |  |  | (2,246)
| Total | $ | 9,311 |  | $ | 13,309 |  | $ | 32,563 |  | $ | 37,419
(Loss) income from operations |  |  |  |  |  |  |  |  |  |  |
| Heavy Duty Diesel Systems | $ | (640) |  | $ | 678 |  | $ | 223 |  | $ | 205
| Catalyst |  | 90 |  |  | 597 |  |  | 673 |  |  | 850
| Corporate |  | (1,847) |  |  | (1,202) |  |  | (5,371) |  |  | (4,278)
| Eliminations (1) |  | (3) |  |  | 34 |  |  | (13) |  |  | 112
| Total | $ | (2,400) |  | $ | 107 |  | $ | (4,488) |  | $ | (3,111)
(1) Elimination of Catalyst revenue and profit in ending inventory related to sales to Heavy Duty Diesel Systems.
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,
| 2014 |  | 2013 |  | 2014 |  | 2013
United States | $ | 5,972 |  | $ | 6,450 |  | $ | 17,068 |  | $ | 18,124
Canada |  | 2,413 |  |  | 5,794 |  |  | 12,129 |  |  | 15,477
Europe |  | 926 |  |  | 1,065 |  |  | 3,366 |  |  | 3,818
Total international |  | 3,339 |  |  | 6,859 |  |  | 15,495 |  |  | 19,295
Total revenues | $ | 9,311 |  | $ | 13,309 |  | $ | 32,563 |  | $ | 37,419

X
- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e9038-108599 + Details
Name: | us-gaap_ScheduleOfRevenuesFromExternalCustomersAndLongLivedAssetsByGeographicalAreasTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8813-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 + Details
Name: | us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SegmentReportingAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration