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Geographic, product and industry information - By Industry (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Segment Reporting Information [Line Items]
Revenue	$ 132,333	$ 90,100	$ 54,385
United States [Member]
Segment Reporting Information [Line Items]
Long-lived assets	40,600	22,500
Non-US [Member]
Segment Reporting Information [Line Items]
Long-lived assets	3,500	3,000
Industrial chemicals/materials
Segment Reporting Information [Line Items]
Revenue	34,475	29,054	21,927
Academic research
Segment Reporting Information [Line Items]
Revenue	25,299	19,642	13,835
Healthcare
Segment Reporting Information [Line Items]
Revenue	71,241	40,036	17,424
Food/agriculture
Segment Reporting Information [Line Items]
Revenue	$ 1,318	$ 1,368	$ 1,199

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Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets.

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