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Goodwill and Intangible Assets | 12 Months Ended
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Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Intangible Assets Our intangible assets consist of goodwill of $1.0 million, which is not being amortized, and purchased technology of $0.7 million, which is amortized over its estimated useful life. No impairment expense has been recorded for the last three fiscal years. Intangible assets balances, subject to amortization, at September 30, 2017 and 2016 consisted of the following (in thousands):
| September 30, 2017 |  | September 30, 2016
| Gross Carrying Value |  | Accumulated Amortization |  | Net Carrying Value |  | Gross Carrying Value |  | Accumulated Amortization |  | Net Carrying Value
Purchased technology | $ | 11,749 |  |  | $ | (11,033 | ) |  | $ | 716 |  |  | $ | 11,749 |  |  | $ | (10,693 | ) |  | $ | 1,056 |
Amortization of intangible assets recorded for the years ended September 30, 2017, 2016 and 2015, was $0.4 million. Estimated amortization expense for each of the five subsequent fiscal years is expected to be (in thousands):
Years Ended September 30, | Total
2018 | $ | 204 |
2019 | 176 |
2020 | 176 |
2021 | 160 |
2022 | — |
On August 7, 2006, we purchased certain assets related to the manufacturing of ANSI medium-voltage switchgear and circuit breaker business from General Electric Company (GE). In connection with the acquisition, we entered into a 15-year supply agreement with GE pursuant to which GE would purchase from us all of its requirements for ANSI medium-voltage switchgear and circuit breakers and other related equipment and components (the Products). We recorded an intangible asset related to this supply agreement. On December 30, 2013, we and GE amended the supply agreement to allow GE to manufacture similar Products for sale immediately and allow them to begin purchasing Products from other suppliers beginning December 31, 2014. In return, GE paid us $10 million upon execution of the amended supply agreement and agreed to pay an additional $7 million over three years, beginning March 2015. The final balance of $2.3 million was received in April 2017. We wrote off the intangible asset related to the original supply agreement and recorded a deferred credit in the amount of $8.1 million at December 31, 2013, the amount by which the total proceeds from GE exceeded the unamortized balance of our intangible asset. We are amortizing this deferred credit over the four-year life of the agreement and have recognized gains in other income of $2.0 million for all three fiscal years ended September 30, 2017, 2016 and 2015. As of September 30, 2017, there is approximately $0.5 million remaining in the deferred credit balance.

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- Definition The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 4: 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=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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