Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Indefinite-lived Intangible Assets [Line Items]
Cost	$ 38,587	$ 38,587
Accumulated Amortization	19,298	14,182
Net	$ 19,289	$ 24,405
Completed technologies
Indefinite-lived Intangible Assets [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	9,416	7,104
Net	$ 10,925	$ 13,237
Customer relationships
Indefinite-lived Intangible Assets [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	9,390	6,701
Net	$ 8,238	$ 10,927
Trade names
Indefinite-lived Intangible Assets [Line Items]
Weighted Average Amortization Period	4 years 6 months	4 years 6 months
Cost	$ 618	$ 618
Accumulated Amortization	492	377
Net	$ 126	$ 241