The following summarizes changes in the carrying amount of goodwill by reporting segments. The $840,000 recorded in 2011 resulted from an earn-out amount that we were required to pay in connection with the acquisition of our PFNWR facility in 2007 (See Note 13 – "Commitments and Contingencies – Earn-Out Amount – Perma-Fix Northwest, Inc. ("PFNW") and Perma-Fix Northwest Richland, Inc. ("PFNWR")) for information regarding this earn-out amount). We recorded $13,016,000 in goodwill within our Services Segment resulting from the acquisition of SEC on October 31, 2011. As a result of the acquisition of SEC on October 31, 2011, during the fourth quarter of 2011, the Company made structural and reporting changes to its internal organization and changes to its operating segments, resulting in changes to its reporting units. As a result of these changes, we reassigned approximately $3,637,000 of the $14,840,000 goodwill from our treatment operations reporting unit (in our Treatment Segment) to our CHPRC reporting unit (in our Services Segment) using a relative fair value approach in accordance with ASC 350, "Intangibles – Goodwill and Other". During the third quarter 2012, we reassigned approximately $2,488,000 of the $3,637,000 goodwill from the CHPRC reporting unit back to the Treatment reporting unit to correct our initial calculation completed during the fourth quarter of 2011. We did not amend our filings as this correction had no impact on our Consolidated Balance Sheet, Consolidated Statement of Operations or our cash flows (see Note 2 – "Summary of Significant Accounting Policies – Goodwill and Other Intangible Assets" for further information regarding this reassignment).

Intangible assets recorded as a result of the acquisition of SEC on October 31, 2011 included a non-compete agreement, customer relationships, customer contracts, and software which were recorded at fair market value of approximately $4,429,000 (see Note 3 – "Business Acquisition" for the purchase price allocation of SEC). The intangible assets acquired are amortized on a straight-line basis over their useful lives with the exception of customer relationships which are being amortized using an accelerated method.

Amortization expense relating to intangible assets for the Company was $675,000, $241,000, and $79,000 for the years ended December 31, 2012, 2011, and 2010, respectively. The increase in amortization expense for the twelve months ended December 31, 2012 was attributed primarily to amortization of intangible assets acquired from the SEC acquisition.