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GOODWILL AND OTHER INTANGIBLE ASSETS (Details) (USD $) | 12 Months Ended |  |  |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 3 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 3 Months Ended |
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Dec. 31, 2012 Permit | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2012 Patents [Member] | Dec. 31, 2011 Patents [Member] | Dec. 31, 2012 Patents [Member] Minimum [Member] | Dec. 31, 2012 Patents [Member] Maximum [Member] | Dec. 31, 2012 Software [Member] | Dec. 31, 2011 Software [Member] | Dec. 31, 2012 Noncompete Agreements [Member] | Dec. 31, 2011 Noncompete Agreements [Member] | Dec. 31, 2012 Customer Contracts [Member] | Dec. 31, 2011 Customer Contracts [Member] | Dec. 31, 2012 Customer Relationships [Member] | Dec. 31, 2011 Customer Relationships [Member] | Sep. 30, 2012 Treatment [Member] | Dec. 31, 2011 Treatment [Member] | Dec. 31, 2012 Treatment [Member] | Dec. 31, 2011 Services [Member] | Dec. 31, 2012 Services [Member] | Dec. 31, 2011 CH Plateau Remediation Company [Member] | Sep. 30, 2012 CH Plateau Remediation Company [Member]
Goodwill [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill after earn-out and acquisition |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 14,840,000 |  |  |  |  |  |  |  |  |
Goodwill [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Beginning Balance | 29,186,000 | [1],[2] | 29,186,000 | [1],[2] | 15,330,000 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 14,000,000 | [1] | 13,691,000 | [1] | 1,330,000 | [1] | 15,495,000 | [1] |  | 3,637,000
Goodwill Recorded in connection with Earn-Out |  |  |  |  | 840,000 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 840,000 | [1] |  |  | 0 | [1] |  |  |  |
Additional Goodwill Recorded as Result of Acquisition |  |  |  |  | 13,016,000 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0 | [1] |  |  | 13,016,000 | [1] |  |  |  |
Reassignment of goodwill from change in reporting unit |  |  |  |  | 0 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,488,000 | (1,149,000) | [1] |  |  | 1,149,000 | [1] |  |  | 3,637,000 |
Goodwill, Ending Balance | 29,186,000 | [1] | 29,186,000 | [1] | 29,186,000 | [1],[2] | 15,330,000 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13,691,000 | [1] | 13,691,000 | [1] | 15,495,000 | [1] | 15,495,000 | [1] | 14,840,000 | 3,637,000
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Useful Lives |  |  |  |  |  |  |  |  |  |  |  | 8 years | 18 years | 3 years |  | 5 years |  | 6 months |  | 12 years |  |  |  |  |  |  |  |  |  |  |  |
Gross Carrying Amount | 5,033,000 |  | 5,033,000 |  | 4,985,000 |  |  |  |  | 453,000 | 402,000 |  |  | 380,000 | 158,000 | 265,000 | 265,000 | 565,000 | 790,000 | 3,370,000 | 3,370,000 |  |  |  |  |  |  |  |  |  |  |
Accumulated Amortization | (1,423,000) |  | (1,423,000) |  | (468,000) |  |  |  |  | (105,000) | (77,000) |  |  | (145,000) | (66,000) | (62,000) | (9,000) | (565,000) | (230,000) | (546,000) | (86,000) |  |  |  |  |  |  |  |  |  |  |
Net Carrying Amount | 3,610,000 |  | 3,610,000 |  | 4,517,000 |  |  |  |  | 348,000 | 325,000 |  |  | 235,000 | 92,000 | 203,000 | 256,000 | 0 | 560,000 | 2,824,000 | 3,284,000 |  |  |  |  |  |  |  |  |  |  |
Fair value of acquired intangible assets | 4,429,000 |  | 4,429,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization period of definite-lived intangible asset | 5 years |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of definite lived permit | 1 |  | 1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Permit capitalized amount |  |  |  |  |  |  |  |  | 545,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization period of permit (in years) | 10 years |  | 10 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Changes in the carrying amount of permits [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance | 16,854,000 |  | 16,854,000 |  | 16,863,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
PCB permit amortized |  |  |  |  | (55,000) |  | (55,000) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Permits in progress |  |  |  |  |  |  | 46,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ending balance | 16,799,000 |  | 16,799,000 |  | 16,854,000 |  | 16,863,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Definite lived intangible assets future amortization expense [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2013 | 645,000 |  | 645,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2014 | 602,000 |  | 602,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2015 | 506,000 |  | 506,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2016 | 429,000 |  | 429,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
2017 | 354,000 |  | 354,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total | 2,536,000 |  | 2,536,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization expense of intangible assets |  |  | $ 675,000 |  | $ 241,000 |  | $ 79,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | No impairment losses have been recorded.
[2] | As presented in the accompanying consolidated financial statements contained herein within this Form 10-K/A – Amendment No. 1.

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- Definition Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 68 -Subparagraph l -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 43 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 72 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -Clause 1 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 34 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141R -Paragraph 72 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=14024403&loc=d3e13816-109267 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 142 -Paragraph 45 -Subparagraph e -Clause 2 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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