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Other Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2012
Payables and Accruals [Abstract] |
Accrued Liabilities |
|  | 2012 |  |  | 2011 |
Customer rebates |  | $ | 3,404,720 |  |  | $ | 2,747,352 |
Remediation liability |  |  | 123,587 |  |  |  | 239,016 |
Pension liability |  |  | 900,291 |  |  |  | 1,012,786 |
Other |  |  | 1,732,940 |  |  |  | 943,676 |
|  | $ | 6,161,538 |  |  | $ | 4,942,830 |

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