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GOODWILL AND INTANGIBLE ASSETS - SCHEDULE OF INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 30, 2018 | Sep. 30, 2017
Indefinite-lived Intangible Assets [Line Items] |  |
Cost | $ 38,587 | $ 3,570
Accumulated Amortization | 5,640 | 1,273
Net | $ 32,947 | $ 2,297
Completed technologies |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period | 6 years 4 months 24 days | 6 years
Cost | $ 20,341 | $ 2,370
Accumulated Amortization | 3,070 | 833
Net | $ 17,271 | $ 1,537
Customer relationships |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period | 4 years 9 months 18 days | 6 years
Cost | $ 17,628 | $ 970
Accumulated Amortization | 2,351 | 341
Net | $ 15,277 | $ 629
Trade names |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Weighted Average Amortization Period | 4 years 6 months | 5 years
Cost | $ 618 | $ 230
Accumulated Amortization | 219 | 99
Net | $ 399 | $ 131

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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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://fasb.org/us-gaap/role/ref/legacyRef -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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- Definition Amount before 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 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -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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