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Goodwill and Other Identifiable Intangible Assets, Net | 6 Months Ended
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Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS, NET | GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS, NET Amortizable identifiable intangible assets were (in thousands):
| March 31, 2017 |  | September 30, 2016
| Gross carrying amount |  | Accum. amort. |  | Net |  | Gross carrying amount |  | Accum. amort. |  | Net
Purchased and core technology | $ | 50,720 |  |  | $ | (45,079 | ) |  | $ | 5,641 |  |  | $ | 46,594 |  |  | $ | (44,999 | ) |  | $ | 1,595 |
License agreements | 18 |  |  | (12 | ) |  | 6 |  |  | 18 |  |  | (10 | ) |  | 8 |
Patents and trademarks | 12,334 |  |  | (10,974 | ) |  | 1,360 |  |  | 11,619 |  |  | (10,871 | ) |  | 748 |
Customer relationships | 21,517 |  |  | (15,930 | ) |  | 5,587 |  |  | 17,463 |  |  | (15,773 | ) |  | 1,690 |
Non-compete agreements | 600 |  |  | (30 | ) |  | 570 |  |  | — |  |  | — |  |  | — |
Total | $ | 85,189 |  |  | $ | (72,025 | ) |  | $ | 13,164 |  |  | $ | 75,694 |  |  | $ | (71,653 | ) |  | $ | 4,041 |
Amortization expense was $0.6 million and $0.5 million for the three month periods ended March 31, 2017 and 2016, respectively. Amortization expense was $0.9 million and $1.0 million for the six month periods ended March 31, 2017 and 2016, respectively. Amortization expense is recorded on our consolidated statements of operations within cost of sales and in general and administrative expense. Estimated amortization expense related to identifiable intangible assets for the remainder of fiscal 2017 and the five succeeding fiscal years is (in thousands):
2017 (six months) | $ | 1,255 |
2018 | 2,475 |
2019 | 1,989 |
2020 | 1,476 |
2021 | 1,268 |
2022 | 1,097 |
The changes in the carrying amount of goodwill are (in thousands):
| Six months ended March 31,
| 2017 |  | 2016
Beginning balance, October 1 | $ | 109,448 |  |  | $ | 100,183 |
Acquisitions | 21,206 |  |  | 11,020 |
Foreign currency translation adjustment | (733 | ) |  | (496 | )
Ending balance, March 31 | $ | 129,921 |  |  | $ | 110,707 |
Goodwill is tested for impairment on an annual basis as of June 30, or more frequently if events or circumstances occur which could indicate impairment. The calculation of goodwill impairment requires us to make assumptions about the fair value of our one reporting unit, which historically has been approximated by using our market capitalization plus a control premium. Control premium assumptions require judgment and actual results may differ from assumed or estimated amounts. Our test for potential goodwill impairment is a two-step approach. We estimate the fair value for our one reporting unit by comparing its fair value (market capitalization plus control premium) to our carrying value. If the carrying value of the reporting unit exceeds its estimated fair value, the second step of the goodwill impairment analysis requires us to measure the amount of the impairment loss. An impairment loss is calculated by comparing the implied fair value of the goodwill to its carrying amount. To calculate the implied fair value of goodwill, the fair value of the reporting unit’s assets and liabilities, excluding goodwill, is estimated. The excess of the fair value of the reporting unit over the amount assigned to its assets and liabilities, excluding goodwill, is the implied fair value of the reporting unit’s goodwill. If our stock price or control premium declines, the first step of our goodwill impairment analysis may fail. We have identified factors that could result in additional interim goodwill impairment testing. For example, we would perform the second step of the impairment testing if our stock price fell below certain thresholds for a significant period of time, or if our control premium significantly decreased. Events or circumstances may occur that could negatively impact our stock price, including changes in our anticipated revenues and profits and our ability to execute on our strategies. In addition, our control premium could decline due to changes in economic conditions in the technology industry or more generally in the financial markets. An impairment 8. GOODWILL AND OTHER IDENTIFIABLE INTANGIBLE ASSETS, NET (CONTINUED) could have a material effect on our consolidated balance sheet and results of operations. There were no triggering events during the second quarter of fiscal 2017. We have had no goodwill impairment losses since the adoption of Accounting Standards Codification (“ASC”) 350, Intangibles-Goodwill and Others, in fiscal 2003.

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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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