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GOODWILL AND INTANGIBLE ASSETS - Intangible Assets Arising from Business Acquisitions (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Jun. 30, 2021 | Sep. 30, 2020
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 100,461 | $ 100,461
Accumulated Amortization | 24,827 | 19,434
Net | $ 75,634 | 81,027
Developed technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Estimated Useful Lives | 15 years |
Gross Carrying Amount | $ 89,096 | 89,096
Accumulated Amortization | 20,693 | 16,222
Net | $ 68,403 | 72,874
Intellectual property |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Estimated Useful Lives | 13 years |
Gross Carrying Amount | $ 1,500 | 1,500
Accumulated Amortization | 188 | 103
Net | $ 1,312 | 1,397
Trade name |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Estimated Useful Lives | 20 years |
Gross Carrying Amount | $ 5,865 | 5,865
Accumulated Amortization | 1,079 | 842
Net | $ 4,786 | 5,023
Customer relationships |  |
Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Estimated Useful Lives | 5 years |
Gross Carrying Amount | $ 4,000 | 4,000
Accumulated Amortization | 2,867 | 2,267
Net | $ 1,133 | $ 1,733

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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