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GOODWILL AND INTANGIBLE ASSETS (Tables) | 12 Months Ended
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Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary of Changes in Goodwill | The following is a summary of changes in goodwill (in thousands):
September 30, 2017 | $ | 51,705 |
Additions | 17,791 |
Impairment | (4,719 | )
September 30, 2018 | 64,777 |
Additions | 18,009 |
September 30, 2019 | $ | 82,786 |
Intangible Assets Arising from Business Acquisitions | Intangible assets arising from business acquisitions consisted of the following:
|  |  | September 30, 2019 |  | September 30, 2018
(in thousands) | Weighted Average Estimated Useful Lives |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net
Finite-lived intangible asset: |  |  |  |  |  |  |  |  |  |  |  |  |
Developed technology | 15 years |  | $ | 89,096 |  |  | $ | 10,256 |  |  | $ | 78,840 |  |  | $ | 70,000 |  |  | $ | 5,589 |  |  | $ | 64,411 |
Trade name | 20 years |  | 5,865 |  |  | 522 |  |  | 5,343 |  |  | 5,700 |  |  | 237 |  |  | 5,463 |
Customer relationships | 5 years |  | 4,000 |  |  | 1,467 |  |  | 2,533 |  |  | 4,000 |  |  | 667 |  |  | 3,333 |
|  |  | $ | 98,961 |  |  | $ | 12,245 |  |  | $ | 86,716 |  |  | $ | 79,700 |  |  | $ | 6,493 |  |  | $ | 73,207 |

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- Definition Tabular disclosure of the characteristics, including initial carrying value, residual amount, weighted average useful life, of finite-lived intangible assets acquired during the period by major class. A major class is composed of intangible assets that can be grouped together because they are similar, either by nature or by their use in the operations of the company. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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