Goodwill and Intangible Assets - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2020	Sep. 30, 2019
Indefinite Lived Intangible Assets By Major Class [Line Items]
Cost	$ 38,587	$ 38,587
Accumulated Amortization	17,252	14,182
Net	$ 21,335	24,405
Completed technologies
Indefinite Lived Intangible Assets By Major Class [Line Items]
Weighted Average Amortization Period	6 years 4 months 24 days
Cost	$ 20,341	20,341
Accumulated Amortization	8,573	7,104
Net	$ 11,768	13,237
Customer relationships
Indefinite Lived Intangible Assets By Major Class [Line Items]
Weighted Average Amortization Period	4 years 9 months 18 days
Cost	$ 17,628	17,628
Accumulated Amortization	8,234	6,701
Net	$ 9,394	10,927
Trade names
Indefinite Lived Intangible Assets By Major Class [Line Items]
Weighted Average Amortization Period	4 years 6 months
Cost	$ 618	618
Accumulated Amortization	445	377
Net	$ 173	$ 241