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Operating Segments (Details) (USD $)
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3 Months Ended | 9 Months Ended | |||||||||||
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Sep. 30, 2013
Segment
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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Dec. 31, 2012
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| Operating Segments [Abstract] | |||||||||||||
| Number of reporting segments | 2 | ||||||||||||
| Financial information of our reporting segments [Abstract] | |||||||||||||
| Revenue from external customers | $ 19,072,000 | $ 29,190,000 | $ 61,685,000 | $ 100,824,000 | |||||||||
| Intercompany revenues | 0 | 0 | 0 | 0 | |||||||||
| Gross profit | 3,129,000 | 4,226,000 | 7,690,000 | 12,525,000 | |||||||||
| Interest income | 8,000 | 10,000 | 27,000 | 31,000 | |||||||||
| Interest expense | 187,000 | 223,000 | 532,000 | 642,000 | |||||||||
| Interest expense - financing fees | 40,000 | 23,000 | 87,000 | 84,000 | |||||||||
| Depreciation and amortization | 1,267,000 | 1,349,000 | 3,843,000 | 4,102,000 | |||||||||
| Segment profit (loss) | (568,000) | (472,000) | (4,436,000) | (2,288,000) | |||||||||
| Segment assets | 135,376,000 | 135,376,000 | 139,691,000 | ||||||||||
| Expenditures for segment assets | 198,000 | 25,000 | 373,000 | 412,000 | |||||||||
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CH Plateau Remediation Company [Member]
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| Revenue, Major Customer [Line Items] | |||||||||||||
| Revenue from major customer | 6,082,000 | 6,036,000 | 18,522,000 | 18,669,000 | |||||||||
| Percentage of revenue from major customer (in hundredths) | 31.90% | 20.70% | 30.00% | 18.60% | |||||||||
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Treatment [Member]
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| Financial information of our reporting segments [Abstract] | |||||||||||||
| Revenue from external customers | 8,929,000 | 11,405,000 | 26,379,000 | 34,284,000 | |||||||||
| Intercompany revenues | 82,000 | 265,000 | 1,149,000 | 1,423,000 | |||||||||
| Gross profit | 1,801,000 | 3,097,000 | 3,968,000 | 6,904,000 | |||||||||
| Interest income | 0 | 0 | 0 | 0 | |||||||||
| Interest expense | 10,000 | 2,000 | 38,000 | 7,000 | |||||||||
| Interest expense - financing fees | 0 | 0 | 0 | 0 | |||||||||
| Depreciation and amortization | 999,000 | 1,104,000 | 3,063,000 | 3,359,000 | |||||||||
| Segment profit (loss) | 616,000 | 1,352,000 | 524,000 | 2,517,000 | |||||||||
| Expenditures for segment assets | 192,000 | 24,000 | 367,000 | 266,000 | |||||||||
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Services [Member]
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| Financial information of our reporting segments [Abstract] | |||||||||||||
| Revenue from external customers | 10,143,000 | 17,785,000 | 35,306,000 | 66,540,000 | |||||||||
| Intercompany revenues | 11,000 | 50,000 | 66,000 | 167,000 | |||||||||
| Gross profit | 1,328,000 | 1,129,000 | 3,722,000 | 5,621,000 | |||||||||
| Interest income | 0 | 0 | 0 | 0 | |||||||||
| Interest expense | 1,000 | 4,000 | (3,000) | 9,000 | |||||||||
| Interest expense - financing fees | 0 | 0 | 0 | 0 | |||||||||
| Depreciation and amortization | 248,000 | 226,000 | 708,000 | 688,000 | |||||||||
| Segment profit (loss) | 387,000 | (47,000) | (432,000) | 1,047,000 | |||||||||
| Expenditures for segment assets | 6,000 | 1,000 | 6,000 | 142,000 | |||||||||
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Segments Total [Member]
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| Financial information of our reporting segments [Abstract] | |||||||||||||
| Revenue from external customers | 19,072,000 | [1] | 29,190,000 | [1] | 61,685,000 | [1] | 100,824,000 | [1] | |||||
| Intercompany revenues | 93,000 | 315,000 | 1,215,000 | 1,590,000 | |||||||||
| Gross profit | 3,129,000 | 4,226,000 | 7,690,000 | 12,525,000 | |||||||||
| Interest income | 0 | 0 | 0 | 0 | |||||||||
| Interest expense | 11,000 | 6,000 | 35,000 | 16,000 | |||||||||
| Interest expense - financing fees | 0 | 0 | 0 | 0 | |||||||||
| Depreciation and amortization | 1,247,000 | 1,330,000 | 3,771,000 | 4,047,000 | |||||||||
| Segment profit (loss) | 1,003,000 | 1,305,000 | 92,000 | 3,564,000 | |||||||||
| Expenditures for segment assets | 198,000 | 25,000 | 373,000 | 408,000 | |||||||||
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Corporate [Member]
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| Financial information of our reporting segments [Abstract] | |||||||||||||
| Revenue from external customers | 0 | [2] | 0 | [2] | 0 | [2] | 0 | [2] | |||||
| Intercompany revenues | 0 | [2] | 0 | [2] | 0 | [2] | 0 | [2] | |||||
| Gross profit | 0 | [2] | 0 | [2] | 0 | [2] | 0 | [2] | |||||
| Interest income | 8,000 | [2] | 10,000 | [2] | 27,000 | [2] | 31,000 | [2] | |||||
| Interest expense | 176,000 | [2] | 217,000 | [2] | 497,000 | [2] | 626,000 | [2] | |||||
| Interest expense - financing fees | 40,000 | [2] | 23,000 | [2] | 87,000 | [2] | 84,000 | [2] | |||||
| Depreciation and amortization | 20,000 | [2] | 19,000 | [2] | 72,000 | [2] | 55,000 | [2] | |||||
| Segment profit (loss) | (1,571,000) | [2] | (1,777,000) | [2] | (4,528,000) | [2] | (5,852,000) | [2] | |||||
| Expenditures for segment assets | 0 | [2] | 0 | [2] | 0 | [2] | 4,000 | [2] | |||||
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Segment discontinued operations [Member]
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| Financial information of our reporting segments [Abstract] | |||||||||||||
| Segment assets | $ 5,287,000 | $ 2,140,000 | $ 5,287,000 | $ 2,140,000 | |||||||||
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