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Goodwill and Other Intangible Assets (Details) (USD $) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Sep. 30, 2012 | Sep. 30, 2013 Segment | Sep. 30, 2012 | Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Gross Carrying Amount | $ 5,304,000 |  |  |  | $ 5,304,000 |  | $ 5,258,000
Accumulated Amortization | (2,138,000) |  |  |  | (2,138,000) |  | (1,648,000)
Net Carrying Amount | 3,166,000 |  |  |  | 3,166,000 |  | 3,610,000
Finite lived intangible assets future amortization expense [Abstract] |  |  |  |  |  |  |
2013 (remaining) | 496,000 |  |  |  | 496,000 |  |
2014 | 585,000 |  |  |  | 585,000 |  |
2015 | 470,000 |  |  |  | 470,000 |  |
2016 | 369,000 |  |  |  | 369,000 |  |
2017 | 355,000 |  |  |  | 355,000 |  |
Total | 2,275,000 |  |  |  | 2,275,000 |  |
Amortization expense of intangible assets | 185,000 |  |  | 159,000 | 528,000 | 480,000 |
Number of additional years provided in subcontract for option renewal |  |  |  |  | 5 years |  |
Number of reporting units on which goodwill impairment test was performed |  |  |  |  | 3 |  |
Impairment charge of goodwill |  | 1,149,000 | 1,149,000 |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill | 28,037,000 |  |  |  | 28,037,000 |  | 29,186,000
Cash flow weighted average cost of capital assumption (in hundredths) | 15.00% |  |  |  | 15.00% |  |
Market capitalization | 41,775,000 |  |  |  | 41,775,000 |  |
Common Stock, outstanding (in shares) | 11,384,490 |  |  |  | 11,384,490 |  | 11,240,000
SYA Unit [Member] |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill | 1,330,000 |  |  |  | 1,330,000 |  |
Preliminary internal step 1 analysis passing percentage (in hundredths) | 224.00% |  |  |  | 224.00% |  |
Safety and Ecology Corporation [Member] |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill | 13,017,000 |  |  |  | 13,017,000 |  |
Preliminary internal step 1 analysis passing percentage (in hundredths) | 18.00% |  |  |  | 18.00% |  |
Treatment Unit [Member] |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Goodwill | 13,690,000 |  |  |  | 13,690,000 |  |
Preliminary internal step 1 analysis passing percentage (in hundredths) | 23.00% |  |  |  | 23.00% |  |
Minimum [Member] |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Projected growth rate | 2.00% |  |  |  | 2.00% |  |
Maximum [Member] |  |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |  |
Projected growth rate | 85.00% |  |  |  | 85.00% |  |
Patent [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Gross Carrying Amount | 499,000 |  |  |  | 499,000 |  | 453,000
Accumulated Amortization | (143,000) |  |  |  | (143,000) |  | (105,000)
Net Carrying Amount | 356,000 |  |  |  | 356,000 |  | 348,000
Patent [Member] | Minimum [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Useful Lives |  |  |  |  | 8 years |  |
Patent [Member] | Maximum [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Useful Lives |  |  |  |  | 18 years |  |
Software [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Useful Lives |  |  |  |  | 3 years |  |
Gross Carrying Amount | 380,000 |  |  |  | 380,000 |  | 380,000
Accumulated Amortization | (235,000) |  |  |  | (235,000) |  | (145,000)
Net Carrying Amount | 145,000 |  |  |  | 145,000 |  | 235,000
Non-compete Agreement [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Useful Lives |  |  |  |  | 1 year 2 months 12 days |  |
Gross Carrying Amount | 265,000 |  |  |  | 265,000 |  | 265,000
Accumulated Amortization | (135,000) |  |  |  | (135,000) |  | (62,000)
Net Carrying Amount | 130,000 |  |  |  | 130,000 |  | 203,000
Customer Contracts [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Useful Lives |  |  |  |  | 6 months |  |
Gross Carrying Amount | 790,000 |  |  |  | 790,000 |  | 790,000
Accumulated Amortization | (790,000) |  |  |  | (790,000) |  | (790,000)
Net Carrying Amount | 0 |  |  |  | 0 |  | 0
Customer Relationships [Member] |  |  |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |
Useful Lives |  |  |  |  | 12 years |  |
Gross Carrying Amount | 3,370,000 |  |  |  | 3,370,000 |  | 3,370,000
Accumulated Amortization | (835,000) |  |  |  | (835,000) |  | (546,000)
Net Carrying Amount | $ 2,535,000 |  |  |  | $ 2,535,000 |  | $ 2,824,000

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