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Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Mar. 31, 2021	Sep. 30, 2020
Indefinite Lived Intangible Assets By Major Class [Line Items]
Cost	$ 38,587	$ 38,587
Accumulated Amortization	22,543	19,298
Net	$ 16,044	$ 19,289
Completed technologies
Indefinite Lived Intangible Assets By Major Class [Line Items]
Weighted Average Amortization Period	6 years 4 months 24 days	6 years 4 months 24 days
Cost	$ 20,341	$ 20,341
Accumulated Amortization	11,026	9,416
Net	$ 9,315	$ 10,925
Customer relationships
Indefinite Lived Intangible Assets By Major Class [Line Items]
Weighted Average Amortization Period	4 years 9 months 18 days	4 years 9 months 18 days
Cost	$ 17,628	$ 17,628
Accumulated Amortization	11,000	9,390
Net	$ 6,628	$ 8,238
Trade names
Indefinite Lived Intangible Assets By Major Class [Line Items]
Weighted Average Amortization Period	4 years 6 months	4 years 6 months
Cost	$ 618	$ 618
Accumulated Amortization	517	492
Net	$ 101	$ 126

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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

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-Topic 350
-SubTopic 30
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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
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