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Business Segment and Geographic Financial Data (Tables) | 6 Months Ended
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Jun. 30, 2018
Segment Reporting [Abstract] |
Schedule of Segment Reporting Information, by Segment | Information about reporting segment net sales and gross margin from continuing operations are provided below:
Three months ended June 30, 2018 | Air Pollution Control Segment |  | FUEL CHEM Segment |  | Other |  | Total
Revenues from external customers | $ | 8,407 |  |  | $ | 3,440 |  |  | $ | — |  |  | $ | 11,847 |
Cost of sales | (6,328 | ) |  | (1,797 | ) |  | — |  |  | (8,125 | )
Gross margin | 2,079 |  |  | 1,643 |  |  | — |  |  | 3,722 |
Selling, general and administrative | — |  |  | — |  |  | (4,763 | ) |  | (4,763 | )
Research and development | — |  |  | — |  |  | (261 | ) |  | (261 | )
Intangible assets abandonment | — |  |  | — |  |  | (317 | ) |  | (317 | )
Operating income (loss) from continuing operations | $ | 2,079 |  |  | $ | 1,643 |  |  | $ | (5,341 | ) |  | $ | (1,619 | )
Three months ended June 30, 2017 | Air Pollution Control Segment |  | FUEL CHEM Segment |  | Other |  | Total
Revenues from external customers | $ | 5,545 |  |  | $ | 4,196 |  |  | $ | — |  |  | $ | 9,741 |
Cost of sales | (4,103 | ) |  | (2,013 | ) |  | — |  |  | (6,116 | )
Gross margin | 1,442 |  |  | 2,183 |  |  | — |  |  | 3,625 |
Selling, general and administrative | — |  |  | — |  |  | (5,923 | ) |  | (5,923 | )
Restructuring charge | (58 | ) |  | — |  |  | — |  |  | (58 | )
Research and development | — |  |  | — |  |  | (280 | ) |  | (280 | )
Building impairment | — |  |  | — |  |  | (2,965 | ) |  | (2,965 | )
Operating income (loss) from continuing operations | $ | 1,384 |  |  | $ | 2,183 |  |  | $ | (9,168 | ) |  | $ | (5,601 | )
Six Months Ended June 30, 2018 | Air Pollution Control Segment |  | FUEL CHEM Segment |  | Other |  | Total
Revenues from external customers | $ | 16,990 |  |  | $ | 7,648 |  |  | $ | — |  |  | $ | 24,638 |
Cost of sales | (11,924 | ) |  | (3,967 | ) |  | — |  |  | (15,891 | )
Gross margin | 5,066 |  |  | 3,681 |  |  | — |  |  | 8,747 |
Selling, general and administrative | — |  |  | — |  |  | (9,684 | ) |  | (9,684 | )
Research and development | — |  |  | — |  |  | (549 | ) |  | (549 | )
Intangible assets abandonment | — |  |  | — |  |  | (317 | ) |  | (317 | )
Operating income (loss) from continuing operations | $ | 5,066 |  |  | $ | 3,681 |  |  | $ | (10,550 | ) |  | $ | (1,803 | )
Six Months Ended June 30, 2017 | Air Pollution Control Segment |  | FUEL CHEM Segment |  | Other |  | Total
Revenues from external customers | $ | 9,547 |  |  | $ | 8,685 |  |  | $ | — |  |  | $ | 18,232 |
Cost of sales | (6,603 | ) |  | (4,282 | ) |  | — |  |  | (10,885 | )
Gross margin | 2,944 |  |  | 4,403 |  |  | — |  |  | 7,347 |
Selling, general and administrative | — |  |  | — |  |  | (11,077 | ) |  | (11,077 | )
Restructuring charge | (58 | ) |  | (61 | ) |  | — |  |  | (119 | )
Research and development | — |  |  | — |  |  | (564 | ) |  | (564 | )
Building impairment | — |  |  | — |  |  | (2,965 | ) |  | (2,965 | )
Operating income (loss) from continuing operations | $ | 2,886 |  |  | $ | 4,342 |  |  | $ | (14,606 | ) |  | $ | (7,378 | )
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area | Information concerning our 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 June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Revenues: |  |  |  |  |  |  |
United States | $ | 8,830 |  |  | $ | 5,915 |  |  | $ | 19,072 |  |  | $ | 12,649 |
Foreign | 3,017 |  |  | 3,826 |  |  | 5,566 |  |  | 5,583 |
| $ | 11,847 |  |  | $ | 9,741 |  |  | $ | 24,638 |  |  | $ | 18,232 |
Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country |
| June 30, 2018 |  | December 31, 2017
Assets: |  |  |
United States | $ | 29,593 |  |  | $ | 29,945 |
Foreign | 17,364 |  |  | 20,539 |
| $ | 46,957 |  |  | $ | 50,484 |

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- Definition Tabular disclosure of the names of foreign countries in which material long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets are located, and amount of such long-lived assets located in that country or foreign geographic area. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599 + Details
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- 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8906-108599 + Details
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