Geographic, Product and Industry Information - Summary of Revenue by Industry (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Revenue	$ 90,100	$ 54,385	$ 25,427
Industrial Chemicals [Member]
Segment Reporting Information [Line Items]
Revenue	29,054	21,927	14,912
Academic Research [Member]
Segment Reporting Information [Line Items]
Revenue	19,642	13,835	5,813
Health Care [Member]
Segment Reporting Information [Line Items]
Revenue	40,036	17,424	4,212
Food And Agriculture [Member]
Segment Reporting Information [Line Items]
Revenue	$ 1,368	$ 1,199	$ 490