Goodwill and Other Intangible Assets - Schedule of Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	6 Months Ended
	Mar. 31, 2021	Sep. 30, 2020
Goodwill And Other Intangible Assets [Line Items]
Goodwill	$ 4,337	$ 4,337
Total other intangible assets	11,918	11,918
Accumulated amortization	(4,453)	(3,587)
Other intangible assets, net	$ 7,465	8,331
Weighted-Average Remaining Useful Lives (in years)	8 years 6 months
Developed Technology
Goodwill And Other Intangible Assets [Line Items]
Total other intangible assets	$ 5,918	5,918
Weighted-Average Remaining Useful Lives (in years)	15 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)	1 year 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)	2 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)	1 year 6 months