Goodwill and Other Intangible Assets - Additional Information (Details) - USD ($)	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Goodwill And Other Intangible Assets [Line Items]
Goodwill	$ 736,000	$ 5,072,000
Other intangible assets	12,583,000	12,583,000
Goodwill impairment	4,336,000
Amortization expense	1,677,000	$ 1,746,000
Reporting unit, carrying value in excess of fair value	8,000,000
Change in fair value of reporting unit	$ 1,000,000.0
Reporting unit change in discount rate	3.00%
Reporting unit change in revenue	4.00%
Reporting unit change in cost of revenue	10.00%
Reporting unit change in research and development expense	13.00%
Adjacent Markets
Goodwill And Other Intangible Assets [Line Items]
Goodwill impairment	$ 0
Emerging Markets
Goodwill And Other Intangible Assets [Line Items]
Goodwill impairment	4,300,000
Aquana, LLC | Adjacent Markets
Goodwill And Other Intangible Assets [Line Items]
Goodwill	700,000
Other intangible assets	600,000
Aquana, LLC | Emerging Markets
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets	3,500,000
Aquana, LLC | Oil and Gas Markets
Goodwill And Other Intangible Assets [Line Items]
Other intangible assets	$ 1,500,000