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Geographic, product and industry information - By Product (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
Synthetic genes
Segment Reporting Information [Line Items]
Revenue	38,964	35,192	26,712
Oligo pools
Segment Reporting Information [Line Items]
Revenue	8,039	4,545	4,594
DNA and Biopharma libraries
Segment Reporting Information [Line Items]
Revenue	12,663	6,348	2,036
NGS tools
Segment Reporting Information [Line Items]
Revenue	$ 72,667	$ 44,015	$ 21,043

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