Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2020	Sep. 30, 2019
Goodwill And Other Intangible Assets [Line Items]
Goodwill	$ 5,008	$ 5,008
Total other intangible assets	11,919	11,918
Accumulated amortization	(2,722)	(1,855)
Other intangible assets, net	$ 9,197	10,063
Weighted-Average Remaining Useful Lives (in years)	9 years 6 months
Developed Technology
Goodwill And Other Intangible Assets [Line Items]
Total other intangible assets	$ 5,919	5,918
Weighted-Average Remaining Useful Lives (in years)	16 years 4 months 24 days
Customer Relationships
Goodwill And Other Intangible Assets [Line Items]
Total other intangible assets	$ 3,900	3,900
Weighted-Average Remaining Useful Lives (in years)	2 years 4 months 24 days
Trade Names
Goodwill And Other Intangible Assets [Line Items]
Total other intangible assets	$ 1,930	1,930
Weighted-Average Remaining Useful Lives (in years)	3 years 4 months 24 days
Non-compete Agreements
Goodwill And Other Intangible Assets [Line Items]
Total other intangible assets	$ 170	$ 170
Weighted-Average Remaining Useful Lives (in years)	2 years 6 months