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Discontinued Operations and Divestitures (Details) (USD $) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 Location | Jun. 30, 2012 | Dec. 31, 2012
Discontinued Operations and Divestitures [Abstract] |  |  |  |  |  |  |  |
Number of previously shut down locations |  |  |  | 2 |  |  |  |
Results of discontinued operations [Abstract] |  |  |  |  |  |  |  |
Net revenues | $ 809,000 |  | $ 599,000 | $ 1,472,000 |  | $ 1,215,000 |  |
Interest expense | (9,000) |  | (9,000) | (13,000) |  | (17,000) |  |
Operating income (loss) from discontinued operations | 67,000 |  | (86,000) | 26,000 |  | (294,000) |  |
Income tax expense (benefit) | 24,000 |  | (26,000) | 11,000 |  | (96,000) |  |
Income (loss) from discontinued operations | 43,000 |  | (60,000) | 15,000 |  | (198,000) |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Property, plant and equipment, net | 1,616,000 |  |  | 1,616,000 |  |  | 1,614,000 |
Allowance for doubtful accounts | 25,000 |  |  | 25,000 |  |  | 45,000 |
Accumulated depreciation | 42,588,000 |  |  | 42,588,000 |  |  | 40,376,000 |
Held for sale [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Accounts receivable, net | 578,000 | [1] |  | 578,000 | [1] |  | 391,000 | [1]
Inventories | 37,000 |  |  | 37,000 |  |  | 32,000 |
Other assets | 16,000 |  |  | 16,000 |  |  | 16,000 |
Property, plant and equipment, net | 1,616,000 | [2] |  | 1,616,000 | [2] |  | 1,614,000 | [2]
Total assets of discontinued operations | 2,247,000 |  |  | 2,247,000 |  |  | 2,053,000 |
Accounts payable | 341,000 |  |  | 341,000 |  |  | 229,000 |
Accrued expenses and other liabilities | 544,000 |  |  | 544,000 |  |  | 528,000 |
Note payable | 53,000 |  |  | 53,000 |  |  | 71,000 |
Environment liabilities | 1,373,000 |  |  | 1,373,000 |  |  | 1,373,000 |
Total liabilities of discontinued operations | 2,311,000 |  |  | 2,311,000 |  |  | 2,201,000 |
Accumulated depreciation | 60,000 |  |  | 60,000 |  |  | 60,000 |
Not held for sale [Member] |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |
Other assets | 55,000 |  |  | 55,000 |  |  | 60,000 |
Total assets of discontinued operations | 55,000 |  |  | 55,000 |  |  | 60,000 |
Accounts payable | 15,000 |  |  | 15,000 |  |  | 15,000 |
Accrued expenses and other liabilities | 796,000 |  |  | 796,000 |  |  | 884,000 |
Environment liabilities | 195,000 |  |  | 195,000 |  |  | 241,000 |
Total liabilities of discontinued operations | $ 1,006,000 |  |  | $ 1,006,000 |  |  | $ 1,140,000 |
[1] | net of allowance for doubtful accounts of $25,000 and $45,000 as of June 30, 2013 and December 31, 2012, respectively.
[2] | net of accumulated depreciation of $60,000 for each period presented.

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