Geographic, product and industry information - By Industry (Details) - USD ($) $ in Thousands	12 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 203,565	$ 132,333	$ 90,100
Industrial chemicals/materials
Segment Reporting Information [Line Items]
Revenue	57,940	34,475	29,054
Academic research
Segment Reporting Information [Line Items]
Revenue	37,097	25,299	19,642
Healthcare
Segment Reporting Information [Line Items]
Revenue	106,363	71,241	40,036
Food/agriculture
Segment Reporting Information [Line Items]
Revenue	$ 2,165	$ 1,318	$ 1,368

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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+ Details