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Industry Segments (Narrative) (Details) | 12 Months Ended
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Dec. 31, 2017 USD ($) subsidiaries segments Entitiies | Dec. 31, 2016 USD ($) Entitiies | Dec. 31, 2015 USD ($) Entitiies
Segment Reporting Information [Line Items] |  |  |
Number of Reportable Segments | segments | 2 |  |
Goodwill | $ 6,003,525 | $ 1,354,730 |
Goodwill impairment | $ 0 | 0 | $ 17,158,249
Metals Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of subsidiaries (subsidiaries) | subsidiaries | 3 |  |
Goodwill | $ 4,648,795 | 0 | 0
Goodwill impairment | $ 0 | 0 | 17,158,249
Concentration risk (percentage) | 80.00% |  |
Number of suppliers (entities) | Entitiies | 9 |  |
Number of suppliers providing majority of supplies (entities) | Entitiies | 1 |  |
Specialty Chemicals Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of subsidiaries (subsidiaries) | subsidiaries | 2 |  |
Goodwill | $ 1,354,730 | 1,354,730 |
Concentration risk (percentage) | 52.00% |  |
Number of suppliers providing majority of supplies (entities) | Entitiies | 15 |  |
Corporate [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Environmental charges | $ 37,748 | $ 48,000 | $ 1,332
Supplier One [Member] | Metals Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk (percentage) | 40.00% |  |
Revenue [Member] | Metals Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk (percentage) |  |  | 14.00%
Revenue [Member] | Specialty Chemicals Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk (percentage) | 23.00% | 25.00% | 31.00%
United States [Member] | Metals Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of major customers (entities) | Entitiies | 0 | 0 | 1
United States [Member] | Specialty Chemicals Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of major customers (entities) | Entitiies | 1 | 1 | 1
BRISMET, Palmer and Specialty [Member] | Metals Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Ownership percentage of subsidiary (percent) | 100.00% |  |
Manufacturers Soap and Chemical Company [Member] | Specialty Chemicals Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Ownership percentage of subsidiary (percent) | 100.00% |  |
Maximum [Member] | Revenue [Member] | Metals Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Concentration risk (percentage) | 10.00% | 10.00% |

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